Dean's Blue Hole, Long Island, Bahamas.

First snow of the season today at the Maroon Bells - Aspen, Colorado

The Twelve Apostles, Australia

The lone tree, South of New Zealand

Blue-Green Algae bloom, Lake Erie, US

Autumn in Patagonia, Argentina.

Cliff side Channel, Grass Valley, CA

Calaveras Big Trees State Park, Arnold, CA

Joshua Tree National Park

Anderson Falls. Indiana

Natural terrace pool, Pamukkale, Turkey.

A desert in the middle of Iran. Photo by Arash Karimi

Carlsbad Caverns