Ancient (only 1/6):

• Pyramids of Egypt

Medieval:

• Stonehenge, England
• Colosseum, Italy
• Catacombs of Alexandria, Egypt
• Great Wall of China, China
• Porcelain Tower of Nanking, China
• Hagia Sophia, Turkey
• Leaning Tower of Pisa, Italy

Natural:

• Mount Everest
• Grand Canyon
• Great Barrier Reef
• Paricutin Volcano
• Victoria Falls
• Harbour at Rio de Janeiro
• Northern Lights

Modern: