Category
page 1Lava caves
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Grjótagjá
thumb|Grjótagjá cave in summer 2009
thumb|Landscape above Grjótagjá cave
Grjótagjá () is a small lava cave near lake Mývatn in Iceland. It has a thermal spring inside.
Cueva del Viento
Cave in Icod de los Vinos, Northern Tenerife
lava cave
cave formed in volcanic rock, especially one formed via volcanic processes
Mussard cave
mountain cave on the island of Réunion