4

Yellowstone National Park

4

Maddy's Ohio Diary

3

Fjords of the World

4

Maddy's Arkansas Diary

4

Maddy's Tennessee Diary

4

Chip's Tips on Venezuela

3

Canyons of the World

4

Maddy's Utah Diary

4

Table Mountain, South Africa

4

Chip's Tips on Rwanda

4

Maddy's Virginia Diary

4

Mount Rushmore

4

Maddy's North Carolina Diary

4

Maddy's Arizona Diary

4

Bazaruto Archipelago, Mozambique

4

Chip's Tips on Nigeria

4

Grand Canyon

4

Maddy's Pennsylvania Diary

4

Maddy's Alaska Diary

4

Maddy's South Dakota Diary

4

Mount Fuji, Japan

4

Maddy's Oregon Diary

4

Chip's Tips on Chile

4

Maddy's Wyoming Diary

3

Valleys of the World

4

Chip's Tips on Ghana

4

Maddy's Idaho Diary

4

Chip's Tips on Honduras

4

Maddy's Washington Diary

3

Sinkholes of the World