4

Yellowstone National Park

4

Maddy's Kentucky Diary

4

Maddy's Arizona Diary

4

Bazaruto Archipelago, Mozambique

4

Chip's Tips on Ghana

4

Chip's Tips on Botswana

4

Maddy's Montana Diary

4

Maddy's California Diary

3

Wetlands of the World

4

Maddy's Virginia Diary

4

Maddy's North Carolina Diary

4

Chip's Tips on Rwanda

4

Chip's Tips on Nigeria

3

Valleys of the World

4

Chip's Tips on Venezuela

3

Sinkholes of the World

4

Sossusvlei Dunes, Namibia

4

Maddy's South Dakota Diary

3

Canyons of the World

4

Mount Rushmore

4

Maddy's Washington Diary

4

Table Mountain, South Africa

4

Maddy's Ohio Diary

4

Maddy's North Dakota Diary

4

Maddy's Wyoming Diary

4

Maddy's Arkansas Diary

4

Chip's Tips on Zambia

4

Maddy's Pennsylvania Diary

4

Maddy's Alaska Diary

4

Maddy's Colorado Diary