An ancient meteorite crater.
An enclave.
A group of mountains is commonly referred to as a range or a mountain range.
A valley among mountains is commonly referred to simply as a mountain valley.
A group of mountains together is referred to as a mountain range.
topographical
Schookson
A circular hill is called a "round hill" or a "mound."
Because there in Colorado.
An enclave.
ismas
volcanos
land locked
A quadrangle.
Islands
an island!!
Orbit.
Its a sphere.