4

Brandenburg Gate, Germany

3

Anne Frank

3

Meteorites, Meteoroids, and Meteors

3

Pablo Picasso

2

Country Flags of Europe

3

Florence Nightingale

3

Hanukkah

4

U.S.S. Arizona Memorial at Pearl Harbor

4

Sheikh Zayed Mosque, UAE

4

Chip's Tips on Switzerland

3

Martin Luther

4

Chip's Tips on Rwanda

3

May Day

3

Heat and Temperature

3

Ludwig van Beethoven

3

Rivers of the World