Discusses twenty interesting facts about the history of the Colosseum.

Provides information about Machu Picchu, including such facts as the lack of an Incan writing system and that the whole structure was built without mortar.

Discusses interesting facts about the history of the Great Pyramid of Giza, Egypt.

Presents facts, photographs and information on the Great Wall of China.

Creepy catacombs, ancient aqueducts, unbelievable underwater roadways...get readers ready to explore some of the oldest, longest, deepest, and spookiest tunnels