The Pyramid at Chichén Itzá (before 800 A.D.) Yucatan Peninsula, Mexico
Christ the Redeemer (1931) Rio de Janeiro, Brazil
The Great Wall of China (220 B.C and 1368 - 1644 A.D.) China
Machu Picchu (1460-1470), Peru
Petra (9 B.C. - 40 A.D.), Jordan
The Roman Colosseum (70 - 82 A.D.) Rome, Italy
The Taj Mahal (1630 A.D.) Agra, India
Answer: Old shells, or pieces of old shells, pressed together because limestone is made from bones that are parts of the skeleton that got squished together.
Explanation:
honestly i dunno what to do with this...
