Photos of Antarctica. The photos in this gallery were taken while participating in the annual resupply of McMurdo Station, Antarctica.

The images in this gallery were all taken within the National Parks of the United States, including Yellowstone National Park, Grand Teton National Park, and Rocky Mountain National Park.

A gallery of shots taken in Alaska and north in the Arctic.

Underwater photography images. These images were taken from a wide assortment of locales, from warm water to cold, fresh water and salt.