Geographic location
Canada
20
Arctic
14
Krafla
13
New Zealand
12
Antarctic
9
Horne
7
Nesjavellir
7
South Pole
6
Northwest Territories
5
Prieto
5
Roland
5
Brigham
4
Isi
4
The Antarctic
4
Yellowknife
4
Barents Sea
3
Combs
3
Hengill
3
Hubble
3
Lippmann
3
Pauzhetka
3
Seltjarnarnes
3
Stefansson
3
Arctic Ocean
2
Argentina
2
Atkinson
2
Fitzgerald
2
Greenland
2
Indian
2
Long Valley
2
Valles
2
Akureyri
1
Anavgay
1
Anvers
1
Anvers Island
1
Arthur Harbour
1
Beaver Lake
1
Botn
1
Campbell Islands
1
Cape Bird
1
Cape York
1
Christchurch
1
Cornwallis
1
Cornwallis Island
1
Correa
1
Deadwood
1
Fildes
1
Fournier
1
Gustavo
1
Hudson
1
more ...