Lake Abant (Turkish: Abant Gölü) is a freshwater lake in Turkey's Bolu Province in northwest Anatolia, formed as a result of a great landslide. The lake lies at an altitude of 1,328 m (4,357 ft) at a distance of 32 km (20 mi) from the provincial seat of Bolu city. It is a favorite vacation and excursion spot for both Turkish and foreign travellers thanks to the natural beauty of its surroundings, which are covered with dense forests, and easy access by car (it is served by a 21 km (13 mi) road leaving from the İstanbul-Ankara motorway O-4 or the highway D.100 at the level of Mount Bolu, three hours' drive from these two largest cities of Turkey). Lake Abant is a natural park.
The lake covers an area of 1.28 km2 (0.49 sq mi) and its deepest spot is 18 m (59 ft). The lake area has two large hotels in the immediate vicinity of the shores, as well as other amenities and services for visitors, who sometimes alternatively opt for the family guesthouses available in the nearby town of Mudurnu 18 km to the south. To the north of the lake, at a distance of 8 km (5.0 mi) from Bolu city, is the main campus of Abant Izzet Baysal University.