The Flatirons with sunset. Boulder, Colorado.

Iguazu Falls, Brazil

Sunset in Sweden

Valle Los Gigantes, Córdoba, Argentina

The Bungle Bungles in Purnululu National Park, Australia

Devetashka Cave, Bulgaria

Piercy Island, Bay of Islands, New Zealand

The Georgian Bay Grotto, Ontario, Canada

A storm clearing over Glencoe, Scotland.

Hokitika Gorge, West Coast, New Zealand

Lake Anna Quarter,

Sunrise over the Superstition Mountains in Arizona

Second Beach, Olympic Peninsula in Washington