Balbriggan, Dublin, IE

Stunning pic of Monument Valley. (does anyone know how this was formed?)

Sun set in Disco Bay, West Greenland

Beautiful picture of Niagara Falls.

Ptarmigan Lake, Glacier National Park. Via The Real Good Times blog

A hanging valley in Rocky Mountain National Park, Estes Park, CO

Durdle Door in Dorset, Great Britain

Lake Powell, UT.

Blue-Green Algae bloom, Lake Erie, US

Amazing shot of Lightning, Malaysia

Monti Sibillini, Italy

Anchorage, Alaska

Plitvice, Croatia