high altitude
tropical
remote
Chile
Denmark
Bangladesh
Afghanistan
Antarctica
Pribilof Islands
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Gulkana
temperate
outdoor
Asia
polar
Djibouti
🔍
caves at Buttenheim, Germany
Bing Cave
19km
wikipedia
website
Shell source
19km
wikipedia
website
Maiden cave
19km
wikipedia
website
Moggaster cave
20km
wikipedia
website
Schönstein Cave
21km
wikipedia
Rosenmüller cave
22km
wikipedia
website
Zoolithenhöhle
22km
wikipedia
website
Oswald Cave
23km
wikipedia
Doctor's Den
23km
wikipedia
Wonder cave
24km
wikipedia
website
Joke cave
24km
wikipedia
Giant castle (cave)
27km
wikipedia
website
Quack lock
27km
wikipedia
website
Esper cave
27km
wikipedia
website