« Previous
Next »
Region
- Afghanistan38
- Mars (Planet)34
- Venus (Planet)22
- Washington (State)Clark County13
- MissouriShannon County12
- Appalachian Basin10
- ArizonaMohave County10
- ArizonaCoconino County9
- Edwards Aquifer (Tex.)8
- NevadaNye County7
- Washington (State)Cowlitz County7
- CaliforniaInyo County6
- CaliforniaSanta Barbara County6
- OregonMultnomah County6
- Trinity Aquifer (Tex.)6
- Alaska5
- ColoradoEagle County5
- ColoradoLarimer County5
- Goa (India : State)5
- HawaiiMauna Loa (Hawaii Island)5