Lake Ohrid straddles the mountainous border between southwestern Macedonia and eastern Albania. It is one of Europe's deepest and oldest lakes, preserving a unique aquatic ecosystem that is of worldwide importance, with more than 200 endemic species. The importance of the lake was further emphasized when it was declared a World Heritage site by UNESCO in 1979 and when, in 2010, NASA decided to name one of Titan's lakes after Lake Ohrid. The towns situated at the lakeside are Pogradec in Albania, along with Ohrid and Struga in Macedonia.
Lake Ohrid is the deepest lake of the Balkans, with a maximum depth of 288 m (940 ft) and a mean depth of 155 m (508 ft). It covers an area of 358 km² (138 sq mi), containing an estimated 55.4 km³ of water. It is 30.4 km long by 14.8 km wide at its maximum extent with a shoreline length of 87.53 km, shared between Macedonia (56.02 km) and Albania (31.51 km). The Ohrid Lake is divided between Republic of Macedonia and Albania. Of the total surface area, 248 km2 belongs to Republic of Macedonia and 110 km2 belongs to Albania.