Grjótagjá

Jarðböðin – Mývatn Nature Baths is a tourist attraction, one of the H

蓝湖可以指：

Hverfjall (also known as Hverfell) is a tephra cone or tuff ring

Hverir is een gebied met hete bronnen in het noorden van IJsland.

Mývatn is a shallow eutrophic lake situated in an area of active

Krafla is a caldera of about 10 km in diameter with a 90 km long f

Selfoss is a waterfall in the river Jökulsá á Fjöllum in the north of

A Catedral de Sal é un recinto construído no interior das minas de s

Karaca Cave (Turkish: Karaca Mağarası) is a network of caves l

Batu Caves is a limestone hill, which has a series of caves and cave

Saeva dupka (Bulgarian: Съева дупка) is a cave in Northern Bulgaria

As minas de sal de Wieliczka, na cidade polaca de Wieliczka,