The 10 Deepest Lakes in the World

Vanessa Korovina

Updated: 13 August 2025 ·

Have you ever swum in a lake so deep that you can't see the bottom, with cold water and darkness extending infinitely beneath your feet?
There's nothing wrong with being afraid of deep water; after all, countless legends and mysteries are associated with dark depths.
But we at Travel365 are daring travelers, which is why we bring you the discovery of the ten deepest lakes in the world...

10 - Matano, Indonesia - 590 meters

Matano

It is a tectonic lake located in South Sulawesi, Indonesia. Lake Matano is famous for its crystal-clear waters and the many endemic species of fish that live here.

9 - Crater Lake, Oregon (USA) - 594 meters

Crater Lake

The lake was formed about 7,700 years ago from the collapse of the Munt Mazama volcano. It is known as one of the most beautiful volcanic lakes in the world.

8 - Great Slave, Canada - 614 meters

Great Slave

Also known as Grand Lac des Esclaves, Great Slave Lake covers 11,000 square kilometers in the Northwest Territories of Canada and reaches a depth of 614 meters, making it the deepest lake in North America.

7 - Issyk Kul, Kyrgyzstan - 668 meters

Issyk Kul

Although surrounded by snow-capped peaks, Issyk-Kul never freezes, hence its name, which means "hot lake."

6 - Malawi Lake, Mozambique-Tanzania-Malawi - 706 meters

Malawi Lake

Positioned higher, we find Lake Malawi, the third largest lake on the African continent. Also known as Lake Nyasa, it is located between Malawi, Mozambique, and Tanzania.

5 - O'Higgins-San Martín, Chile-Argentina - 836 meters

O'Higgins-San Martín

Located in Patagonia, Lake O'Higgins-San Martín is 836 meters deep, has an area of 1,013 square kilometers, and a length of 525 kilometers.

4 - Vostok, Antarctica - 900 meters

Vostok

Vostok is the largest of nearly 400 known subglacial lakes in Antarctica. The lake is located beneath the Vostok Station.

3 - Caspian Sea, Azerbaijan-Iran-Kazakhstan-Russia-Turkmenistan - 1,025 meters

Caspian Sea

It is the largest lake on Earth by surface area and one of the deepest. It is claimed by four nations: Russia, Azerbaijan, Iran, Turkmenistan, and Kazakhstan.

2 - Tanganyika, Central Africa - 1,470 meters

Tanganyika

This vast lake is claimed by four nations: Tanzania, the Democratic Republic of the Congo, Burundi, and Zambia. It is estimated to be the second largest freshwater lake in the world by volume. It is the second lake in the world by water volume.

1 - Baikal, Siberia-Russia - 1,637 meters

Baikal

Baikal is the deepest lake in the world, with a depth of 1,637 meters, and it is also the most voluminous freshwater lake. It contains about 20% of the unfrozen freshwater on the planet.

And in Italy?

Finally, let's conclude with some interesting facts about Italian lakes.
When considering maximum depth, in first place we have Lake Como, which reaches 410 meters.
Next is Lake Maggiore, with a maximum depth of about 372 meters, which is actually the lake with the highest average depth (177 meters compared to 154 meters of Lake Como). Finally, completing the podium is Lake Garda with a maximum depth of about 346 meters and an average of 133 meters. However, Lake Garda also holds a record as it has the largest surface area!