An ancient meteorite crater.
A circular basin surrounded by mountains is typically referred to as a crater or caldera, depending on whether it was formed by volcanic activity or by the collapse of a volcanic cone.
An enclave.
A valley among mountains is commonly referred to simply as a mountain valley.
A group of mountains is commonly referred to as a range or a mountain range.
A group of mountains together is referred to as a mountain range.
topographical
circular
Schookson
mound
volcanos
ismas
An enclave.
Because there in Colorado.
Its called an orbit.
The answer is: color wheel
Its a sphere.
an island!!
Islands