2

Jazz Gets Some Zzs

4

Great Wall of China, China

3

Coral Reefs of the World

4

Early Native Americans

4

Stonehenge, England

4

Sphinx, Egypt

4

London Eye, London

3

Caves of the World

3

Stars

4

Golden Temple, India

4

Grand Canyon

3

The Mount Kenya Trio

3

Drainage Basins of the World

4

Okavango Delta, Botswana

4

Ngorongoro Crater, Tanzania

4

Father's Road Trip

3

Capes and Peninsulas of the World

4

Burj Al Arab, United Arab Emirates

3

Isthmuses of the World

3

Saturn

3

Mercury

4

Windsor Castle, England

4

Victoria Falls, Zimbabwe/Zambia

3

Fjords of the World

3

Uranus

2

The Spider Web

4

Canterbury Cathedral, Canterbury, England

3

Coastal Plains of the World

3

The Frogs and The Ox

4

Mecca, Saudi Arabia