3

Lakes of the World

4

Lake Malawi, Malawi

2

Lake Day

4

Maddy's Utah Diary

4

Maddy's West Virginia Diary

4

Maddy's South Dakota Diary

4

Maddy's Iowa Diary

4

Maddy's Minnesota Diary

4

Chip's Tips on New Zealand

3

Amazing Earth - Part 1

4

Maddy's Colorado Diary

2

Landforms

4

Chip's Tips on The Dominican Republic

4

Maddy's Maryland Diary

4

Amphibians

2

The Wonderful World of Water

4

Maddy's Arizona Diary

4

Maddy's New Jersey Diary

4

Nile River, Egypt

4

Maddy's Illinois Diary

3

Coastal Plains of the World

4

Chip's Tips on Honduras

4

Chip's Tips on Chile

4

Ngorongoro Crater, Tanzania

4

Maddy's South Carolina Diary

4

Maddy's Connecticut Diary

4

The Willis Tower

3

Glaciers of the World

4

Maddy's Oklahoma Diary

4

Maddy's Louisiana Diary