Hill fortress of Sigiriya, Sri Lanka

Loch Lomond, Scotland

Sunset at Big Sur

Ironton, Colorado

Columbia River Gorge, Washington State

Carlsbad Caverns

The coastline of Portugal

The coast of Porticcio, Corsica

Hanging Lake, Colorado

Autumn in Adirondacks, New York

Durdle Door, United Kingdom

A shallow branch of The Rhine River next to Mt. Rheinwald , Switzerland

The sky in the ground. Yellowstone National Park