A high peninsula between two continents and four seas — how its mountains, plateaus, rivers and climates fit together, and why they matter for anyone travelling or reading its history.
Last reviewed on 27 September 2026.
Türkiye (Turkey) covers about 783,000 km² — roughly three times the size of the United Kingdom, or a little larger than Texas. It is a country of highlands: most of its land lies well above sea level, and the flat, low-lying coastal strips that holidaymakers know are the exception rather than the rule. Understanding a handful of physical facts — where the mountains run, where the rain falls, which rivers drain where — explains a great deal about why cities, roads, crops and even earthquakes are distributed the way they are.
About 3% of the country's territory lies in Europe, in the corner of the Balkan peninsula known as Eastern Thrace (Trakya). The remaining 97% or so is Anatolia (Anadolu), also called Asia Minor — the broad peninsula bounded by the Black Sea to the north, the Aegean to the west and the Mediterranean to the south, running east into the highlands of the Caucasus and Iran.
Thrace is small but disproportionately important. It contains the European half of Istanbul, the old Ottoman capital of Edirne, and the rolling farmland of Tekirdağ and Kırklareli, known for sunflowers, wheat and wine. The land border with Greece follows the Meriç (Evros) river; the border with Bulgaria runs through the low Istranca (Strandzha) hills.
Europe and Asia are separated here not by open sea but by a chain of narrow waters collectively called the Turkish Straits:
Passage through the straits by merchant and naval shipping is governed by the Montreux Convention of 1936, which gives Türkiye control of the waterways while guaranteeing free passage for civilian ships in peacetime.
Türkiye has coastline on four bodies of water, and each produces a different kind of shore. Including islands, the coast totals more than 8,000 km.
A long, fairly straight northern coast backed closely by mountains. Wet, green and forested, with tea and hazelnuts on the slopes. Beaches exist but are not the draw; the Black Sea region is about highlands and valleys.
The inland sea between the two straits, ringed by Istanbul, Kocaeli, Yalova, Bursa and Tekirdağ. The Marmara region is the country's most industrial and densely populated.
A deeply indented coast of bays, peninsulas and islands, many of them Greek islands lying only a few kilometres offshore. River valleys run inland from İzmir and Kuşadası. See the Aegean region.
The Taurus mountains drop almost straight into the sea along much of this coast, broken by fertile plains around Antalya and Adana. The Mediterranean region is the heart of beach tourism.
Anatolia is essentially a raised plateau held between two great mountain systems that run roughly east–west, parallel to the northern and southern coasts. They converge in the east, where the land rises into the highest and most rugged part of the country.
The Pontic ranges (Kuzey Anadolu Dağları) run along the Black Sea coast from roughly Bolu to the Georgian border. They are steepest and highest in the east, where the Kaçkar Mountains above Rize rise to nearly 4,000 m and hold small glaciers and alpine lakes. These mountains catch moisture blowing off the Black Sea, which is why their northern slopes are dense with forest while the land immediately behind them is dry.
The Taurus (Toros Dağları) form an arc along the south, from the lakes district near Isparta through the ranges behind Antalya and Mersin and on towards the southeast. Limestone dominates, which produces gorges, karst springs, caves and the dramatic cliffs of the Lycian coast. The Aladağlar massif, one of the most popular climbing areas in the country, rises to about 3,750 m. Historically the Taurus were a formidable barrier: the pass known as the Cilician Gates north of Tarsus was for millennia the main route between the Anatolian plateau and the Syrian coast. In the southeast the range continues as the Southeastern Taurus, separating the eastern highlands from the Mesopotamian plain.
Much of the plateau and the east is volcanic. Mount Erciyes (about 3,900 m) above Kayseri and Mount Hasan near Aksaray are extinct or dormant volcanoes whose ancient ash, compressed into soft tuff and then eroded, created the rock landscape of Cappadocia. Further east, the land rises to plateaus of 1,500–2,000 m around Erzurum and Kars, and to the country's highest summit:
Between the two mountain chains lies the Central Anatolian plateau, generally 800–1,200 m high and mostly treeless. Rain shadow from the surrounding ranges makes it semi-arid: wheat and barley are grown across vast open fields, especially around Konya, and sheep grazing has shaped the steppe for thousands of years. Ankara, the capital, sits near the plateau's northern edge. Summers are hot and dry, winters cold, often with snow. Parts of the plateau around Konya are among the driest areas in the country, and heavy use of groundwater for irrigation has led to falling water tables and, in places, sinkholes — a subject of ongoing study and concern.
Because the interior is high and ringed by mountains, many Turkish rivers take long, looping routes to the sea, and some basins on the plateau have no outlet at all.
Lake Van in the far east is the largest lake in Türkiye, covering roughly 3,700 km² at an altitude of about 1,650 m. It has no outlet, and its water is strongly alkaline (a soda lake), so few fish species survive in it; the best known, the inci kefali (pearl mullet), migrates up freshwater streams to spawn each spring. The lake was formed when lava from the Nemrut volcano blocked its outflow.
Tuz Gölü (Salt Lake) in central Anatolia is the second largest. It is extremely shallow and hypersaline; in summer much of it dries to a white crust, and it supplies a large share of the country's table salt. It is also a major breeding ground for greater flamingos.
The Lakes District (Göller Bölgesi) around Isparta and Burdur holds a cluster of freshwater and saline lakes, including Eğirdir and Beyşehir.
Mountains, rather than latitude, decide most of Türkiye's climate. The ranges that parallel the coasts trap moisture on their seaward sides and leave the interior dry. The result is a series of sharply different zones within a day's drive of each other.
| Zone | Where | Character |
|---|---|---|
| Mediterranean | Aegean and Mediterranean coasts | Hot, dry summers; mild, rainy winters. Snow is rare at sea level but common in the mountains behind. |
| Black Sea (humid temperate) | Northern coast, especially the east | Rain in every season; mild temperatures. Rize is the wettest province, which is why tea grows there. |
| Transitional / Marmara | Istanbul and the Marmara basin | A mix of Mediterranean and Black Sea influences: warm humid summers, cool damp winters, occasional snow. |
| Continental steppe | Central Anatolian plateau | Low rainfall, hot days and cool nights in summer, cold snowy winters. |
| Harsh continental | Eastern highlands (Erzurum, Kars, Ardahan) | Long, severe winters with deep snow and very low temperatures; short, pleasant summers. |
| Hot semi-arid | Southeast (Şanlıurfa, Diyarbakır, Mardin, Batman) | Very hot, dry summers — among the hottest in the country — and mild to cool winters. |
For month-by-month advice on how these zones affect travel, see the best time to visit.
Türkiye shares land borders with eight countries:
At sea, Türkiye faces Greece's many Aegean islands, some of them within sight of the Turkish mainland, and Cyprus to the south. Maritime boundaries, airspace and continental-shelf rights in the Aegean and eastern Mediterranean are disputed between Türkiye and Greece and involve Cyprus; the positions of each side are summarised on the government and politics and Northern Cyprus pages.
Almost all of Anatolia sits on a small tectonic plate being squeezed westward between the Arabian and Eurasian plates. Its northern edge is the North Anatolian Fault, running close to the Black Sea coast and under the Sea of Marmara; its southeastern edge is the East Anatolian Fault. This is the reason Türkiye is one of the most earthquake-prone countries in the world, and also the reason for its hot springs, travertine terraces such as Pamukkale, and its volcanoes. The full picture is on the earthquakes in Türkiye page.
For a country in the temperate zone, Türkiye is unusually rich in species. Three of the world's recognised biodiversity hotspots — the Mediterranean, the Caucasus and the Irano-Anatolian — meet on its territory, and the variety of altitudes and climates creates many isolated habitats. Estimates commonly put the number of vascular plant species and subspecies at around 12,000, of which roughly a third are found nowhere else. Many popular garden bulbs, including wild tulips, crocuses and snowdrops, have wild relatives here.
Türkiye is also a major bird migration corridor. Every spring and autumn, large numbers of storks, pelicans and birds of prey funnel over the Bosphorus and through the Belen Pass in Hatay, avoiding long sea crossings. Wetlands such as the Kızılırmak delta, Lake Manyas (Kuş Gölü) near Bandırma and the Göksu delta are important stopover sites. Brown bears, wolves, lynx and wild goats survive in the less populated highlands. Loggerhead sea turtles nest on Mediterranean beaches such as İztuzu near Dalyan, where nesting areas are protected at night during the breeding season.
Since a geography congress in 1941, Türkiye has conventionally been divided into seven regions based on climate, relief and land use rather than administrative boundaries. They remain the standard reference in schools and statistics:
These regions are not units of government; the country is administered through 81 provinces, and a few provinces straddle regional boundaries.
Türkiye covers about 783,000 km², roughly three times the area of the United Kingdom. About 3% of that lies in Europe (Eastern Thrace) and the rest in Anatolia, in Asia.
Both. A small part, Eastern Thrace, including the western half of Istanbul and Edirne, is in Europe. The great majority of the country, Anatolia, is in Asia. The Bosphorus, the Sea of Marmara and the Dardanelles form the dividing line.
Mount Ağrı, known internationally as Ararat, at 5,137 m. It is a dormant volcano in the far east of the country, near the borders with Iran, Armenia and Azerbaijan's Nakhchivan exclave. Climbing it requires a permit arranged through a licensed agency.
The Kızılırmak, at roughly 1,350 km, is the longest river that flows entirely within Türkiye. It rises in Sivas province and reaches the Black Sea near Bafra. The Euphrates and Tigris are longer overall but flow on into Syria and Iraq.
Eight: Greece and Bulgaria in Europe; Georgia, Armenia and Azerbaijan (via the Nakhchivan exclave) in the Caucasus; Iran to the east; and Iraq and Syria to the south.
Lake Van, in the far east, covering roughly 3,700 km². It has no outlet and its water is highly alkaline. The second largest is Tuz Gölü, a shallow salt lake in central Anatolia.