Grand Canyon sunset

Colorado River / Grand Canyon Photos

Pfeiffer Burns underwater park, Big Sur, California

Pfeiffer Burns underwater park, Big Sur, California

More Photos of Big Surf, California

Furcifer campani chameleon eating an insect in Madagascar

Furcifer campani chameleon eating an insect in Madagascar.

Photographs of reptiles in Madagascar

Aerial view of the Manambolo River in Madagascar

Aerial view of the Manambolo River in Madagascar.

Exploring the Manambolo River in Madagascar

Picture: Flatid leaf bugs (Phromnia rosea)

Adult Flatid leaf bugs (Phromnia rosea) in Madagascar. In their nymph form, these insects look completely different.

Photos of Cenotes Caves in Mexico

The Yucatan peninsula has virtually no surface streams due ot its limestone foundation -- a relic of its past life as coral reef on the bottom of the ocean. Ground water sinks through the porous limestone and travels to the sea in underground rivers and caves (formed from millenia of acidified water dissolving conduits in the limestone). To date, almost sixty cave systems with more than 300 miles of passageways have been discovered. These underwater streams can be accessed through cenotes, sinkholes in the surface limestone.

Photos of Cenotes Caves in Mexico

Lion Photos in Botswana (Savuti, Moremi parks)

Lion Photos in Botswana (Savuti, Moremi parks)