The Seven Wonders of the Ancient World
- The Great Pyramid of Giza
- The Hanging Gardens of Babylon
- The Temple of Artemis at Ephesus
- The Statue of Zeus at Olympia
- The Mausoleum at Halicarnassus
- The Colossus of Rhodes
- The Pharos of Alexandria
The Seven Wonders of the Medieval Mind
- Stonehenge
- The Colosseum
- The Catacombs of Kom el Shoqafa
- The Great Wall of China
- The Porcelain Tower of Nanjing
- The Hagia Sophia
- The Leaning Tower of Pisa
The Seven Natural Wonders of the World
- Mount Everest
- The Great Barrier Reef
- The Grand Canyon
- Victoria Falls
- The Harbor of Rio de Janeiro
- Paricutin Volcano
- The Northern Lights
The Seven Underwater Wonders of the World
- Palau
- The Belize Barrier Reef
- The Galapagos Islands
- The Northern Red Sea
- Lake Baikal
- The Great Barrier Reef
- The Deep Sea Vents
The Seven Wonders of the Modern World
- The Empire State Building
- The Itaipú Dam
- The CN Tower
- The Panama Canal
- The Channel Tunnel
- The North Sea Protection Works
- The Golden Gate Bridge
The Seven Forgotten Natural Wonders of the World
- Angel Falls
- The Bay of Fundy
- Iguaçú Falls
- Krakatoa Island
- Mount Fuji
- Mount Kilimanjaro
- Niagara Falls
The Seven Forgotten Modern Wonders of the World
- The Clock Tower (Big Ben)
- Eiffel Tower
- The Gateway Arch
- The Aswan High Dam
- Hoover Dam
- Mount Rushmore National Memorial
- The Petronas Towers
Alex Colao Blog 
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