Geographic location
Lava Lake
21
Antarctic
13
East Antarctica
10
Antarctic Peninsula
6
Bransfield Strait
6
Byrd
6
Marie Byrd Land
6
The Antarctic
6
West Antarctica
6
Galapagos
5
Pacific
5
Grunehogna
4
Lake Vostok
4
Arctic
3
Avacha
3
Kiruna
3
Krafla
3
Mid-Atlantic Ridge
3
Mount Erebus
3
Vatnajökull
3
Canada
2
Kverkfjöll
2