A) In the Sinai Peninsula
B) Near the Nile Delta
C) In the Sahara Desert
D) On the Galala Plateau, Egypt

A) Karst-based subterranean environment
B) Volcanic cave system
C) Cavern formed by river erosion
D) Glacier-formed cave

A) Jurassic era
B) Permian era
C) Eocene era
D) Cretaceous era

A) 100 miles west
B) 30 miles east
C) 71 miles (115 km) south-southeast
D) 50 miles north-northeast

A) During an archaeological dig
B) After quarry blasting created an entrance
C) Through satellite imaging
D) By a group of explorers hiking in the area

A) 4,000 ft (1,219 m)
B) 3,000 ft (914 m)
C) 2,300 ft (700 m)
D) 1,500 ft (460 m)

A) 70 ft (21 m)
B) 100 ft (30 m)
C) 30 ft (9 m)
D) 50 ft (20 m)

A) Sandstone
B) Marble
C) Alabaster
D) Granite

A) Stalactites and stalagmites
B) Ice formations
C) Fossilized remains of dinosaurs
D) Geysers and hot springs

A) 1992
B) 2010
C) 2000
D) 1985