Keyhole Arch in Monument Rocks National Natural Area, Kansas, U.S.A.

Keyhole Arch in Monument Rocks National Natural Area, Kansas, U.S.A.

© Charles Gurche/Danita Delimont) ©

Keyhole Arch in Monument Rocks National Natural Area, Kansas, U.S.A.

Keyhole Arch in Monument Rocks National Natural Area, Kansas, U.S.A.

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