4

Eire of the Desert

4

Desert

2

Hot and Dry! Desert

4

Eire of the Desert

4

Chip's Tips on Chile

4

Chip's Tips on Botswana

3

Valleys of the World

4

Chip's Tips on Nigeria

4

Chip's Tips on Egypt

2

Ecosystems

4

Maddy's Washington Diary

4

Maddy's California Diary

4

Chip's Tips on India

4

Sossusvlei Dunes, Namibia

4

Maddy's Utah Diary

4

Chip's Tips on Mexico

4

Chip's Tips on Yemen

4

Okavango Delta, Botswana

3

Mars

3

Continents of the World

4

Maddy's Nevada Diary

4

Maddy's New Mexico Diary

3

Coastal Plains of the World

4

Chip's Tips on China

3

Marco Polo

4

Chip's Tips on Qatar

3

The Winklers' Holiday on Zoo Lovers Day

4

Patsy and Paul at Uluru in Australia

3

David Livingstone

4

Sphinx, Egypt