Lake Baikal holds roughly one-fifth of the world’s unfrozen freshwater, and it is the deepest lake by a wide margin. The Caspian Sea is sometimes classified as a sea. Here are the ten deepest lakes on Earth, in feet and meters:

1. Baikal, Russia: 5,387 ft (1,642 m)
2. Tanganyika, Tanzania / DR Congo / Burundi / Zambia: 4,823 ft (1,470 m)
3. Caspian Sea, Kazakhstan / Turkmenistan / Azerbaijan / Russia / Iran: 3,363 ft (1,025 m)
4. Vostok, Antarctica: 2,953 ft (900 m)
5. O’Higgins-San Martín, Chile / Argentina: 2,621 ft (799 m)
6. Viedma, Argentina: 2,460 ft (750 m)
7. Argentino, Argentina: 2,359 ft (719 m)
8. Malawi, Malawi / Mozambique / Tanzania: 2,316 ft (706 m)
9. Issyk-Kul, Kyrgyzstan: 2,192 ft (668 m)
10. Great Slave, Canada: 2,015 ft (614 m)