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![]() | Door to Hell, Turkmenistan by Anas Shad on 12/29/2012 ![]() ![]() ![]() ![]() 0 votes (Source) | |
![]() | Cano Cristales Colombia by Diana Arevalo on 10/28/2009 ![]() ![]() ![]() ![]() 2 votes (Source) | |
![]() | Cerro Piedra Bola, Jalisco State, Mexico by JPaulo on 10/8/2009 ![]() ![]() ![]() ![]() 0 votes Naturally-formed stone balls, i.e. cannonball concretions and megaspherulites, have been at times mi(...) (Source) | |
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