4

Yellowstone National Park

3

Sinkholes of the World

4

Chip's Tips on Venezuela

4

Chip's Tips on Zambia

3

Wetlands of the World

4

Chip's Tips on Nigeria

4

Maddy's North Carolina Diary

4

Maddy's California Diary

3

Canyons of the World

4

Chip's Tips on Kenya

4

Maddy's Washington Diary

4

Serengeti, Tanzania

4

Chip's Tips on Honduras

4

Maddy's Alaska Diary

4

Chip's Tips on South Africa

4

Chip's Tips on Botswana

4

Chip's Tips on Rwanda

4

Maddy's Oregon Diary

4

Sossusvlei Dunes, Namibia

4

Maddy's Utah Diary

4

Mount Fuji, Japan

4

Bazaruto Archipelago, Mozambique

4

Maddy's Montana Diary

4

Maddy's Arizona Diary

4

Maddy's Pennsylvania Diary

4

Maddy's Maine Diary

4

Chip's Tips on Ghana

4

Maddy's Wyoming Diary

4

Maddy's North Dakota Diary

4

Maddy's Tennessee Diary