2

Country Flags of Oceania

3

Oceans and Seas of the World

3

Coastal Plains of the World

4

Maddy's South Carolina Diary

3

Valleys of the World

3

Islands of the World

3

Jupiter

4

Sossusvlei Dunes, Namibia

4

Maddy's Mississippi Diary

3

Drainage Basins of the World

4

Great Wall of China, China

4

Maddy's Maine Diary

3

Fjords of the World

4

Chip's Tips on Papua New Guinea

4

Maddy's New York Diary

4

Sharks and Other Sea Life

3

Christopher Columbus

2

Landforms

3

Harbors of the World

4

Chip's Tips on Chile

4

Maddy's New Jersey Diary

4

Maddy's Delaware Diary

3

Bays of the World

4

Chip's Tips on Canada

3

Archipelagos of the World

4

Erbil Citadel, Iraq

4

Maddy's Georgia Diary

4

Maddy's California Diary

3

Pressure

3

Amerigo Vespucci