Located at the bottom of an abyss in Albania, the world's biggest underground thermal lake is a one-of-a-kind natural wonder ...

The world's largest lake is so vast that it's four times larger than its closest competitor and is often dubbed as a fully-fledged sea.

With over 8,000 cubic meters of water, it contains more 3.5 Olympic swimming pools of water volume, all geothermally heated.

Likewise, the Great Lakes have an impact on their nearest states, but together also contain roughly 20% of the world's surface freshwater supply ... and Lake Superior is the biggest at 31,700 square ...

Once this was completed, it was established that it is the largest in the world. This underground thermal lake, discovered by Czech researchers in southern Albania, will be further investigated ...

Environment Secretary Steve Reed has pledged to work towards ensuring that "only rainwater" enters England's largest lake.

It's been crowned the world's happiest country for eight consecutive ... It's home to Europe's largest lake district, a spellbinding archipelago and it's the most forested country in Europe ...

Likewise, the Great Lakes have an impact on their nearest states, but together also contain roughly 20% of the world's surface ... and Lake Superior is the biggest at 31,700 square feet.