Photography

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: Summit of Mount Roraima, Venezuela

: Petrified Forest National Park, Arizona

: Acadia National Park, Maine

: Nairobi, Kenya

: Araguaia River, Brazil

: Washington University, St. Louis, Missouri

: Pedra Furada National Park, Brazil

: Serengeti, Tanzania

: Antigua, Guatemala

: Waikiki Beach, Hawaii

: Big Bend National Park, Texas

: Gramado, Brazil

: Mount Kilimanjaro, Tanzania

: Wrigley Field, Chicago

: Bwindi Inpenetrable National Park, Uganda

: Arusha, Tanzania

: Swaziland

: Kruger Park, South Africa

: Arches National Park, Utah

: Kruger Park, South Africa

: Katahdin, Maine

: Kruger Park, South Africa

: Chiquibul forest, Belize

: Big Bend National Park, Texas

: Maputo, Mozambique

: Arusha, Tanzania

: Northern Highlands, Ethiopia

: Pantanal, Brazil

: Paraty, Rio de Janeiro, Brazil

: “United in the battle against HIV/AIDS,” Inhambane, Mozambique

: Iguazu Falls, Brazil/Argentina

: Swaziland

: Edinburgh, Scotland

: Uganda

: Virgin Gorda, British Virgin Islands

: Mount Kilimanjaro, Tanzania

: Mount Kilimanjaro, Tanzania

: Lalibela, Ethiopia

: White Sands, New Mexico

: Chiquibul forest, Belize

: Na Pali Coast, Kauai, Hawaii

: Balquhidder, Scotland

: Mars Desert Research Station, Utah

: Pantanal, Brazil

: Serengeti, Tanzania

: Rocky Mountain National Park, Colorado

: Wichita Mountains State Park, Oklahoma

: Rio Claro, Brazil

: Edinburgh, Scotland

: Bonito, Brazil

: Zanzibar, Tanzania

: Lalibela, Ethiopia

: El Chalten, Argentina

: North Rim, Grand Canyon National Park, AZ

: New York City

: Kauai, Hawaii