Hill fortress of Sigiriya, Sri Lanka

Tahiti, French Polynesia

Colorful houses in Oia, Santorini, Greece

A gorge in Thailand.

Fall in Hart, Michigan

A farmer walks past a terrace of codonopsis pilosula, a traditional Chinese medicine also known as dang shen, in Min county, Gansu province

Reflecting Lake in the Rockies

Hill fortress of Sigiriya, Sri Lanka

Stradbroke Island, Queensland

Batu Caves, Kuala Lumpur, Malaysia

Zhangjiajie National Forest Park, China

Red Beach, Rio

The Everglades