Chapter 1
Deep underground cities and salt palaces
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Chapter 2
Masterpieces of water engineering
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Chapter 3
Forgotten stone fortresses and lost walls
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Chapter 4
Sunken cities and floating stone ruins
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YOUR GOAL
Master of Secret wonders of the world
Ch 3 · Forgotten stone fortresses and lost walls
schopenhauer Forgotten Stone Fortresses
Ranikot winds through the mountains of Sindh (winds through the hills!) / The world's largest fort is lost to the wind (lost to the wind!)
schopenhauer A medieval African city of 18,000 people featured towering stone walls built entirely without mortar.
schopenhauer Hidden deep in the Peruvian Andes, this massive Inca citadel is three times larger than Machu Picchu but rarely visited.
BETA
schopenhauer Drag forgotten stone fortresses onto the map to discover the secrets of lost ancient walls.
Fun Fact
Llama terraces: The agricultural terraces of Choquequirao feature decorative white quartz stones shaped like llamas embedded directly into the dark granite walls.
Glossary
rampart (noun)
A defensive wall of stone or earth built to protect a castle, fort, or settlement. Built in the fifteenth century, India's Kumbhalgarh Fort features a massive stone rampart protecting its ancient citadel.
A defensive wall of stone or earth built to protect a castle, fort, or settlement. Built in the fifteenth century, India's Kumbhalgarh Fort features a massive stone rampart protecting its ancient citadel.
Quiz
Which fortress is home to the second-longest continuous wall in the world, located in Rajasthan, India?
Quiz
What unique animal shape is depicted in the white quartz stones on Choquequirao's terraces?
Quiz
What material was used to build the massive towering walls of Great Zimbabwe without mortar?
Quiz
During which century was the mountain fortress of Sigiriya in Sri Lanka constructed?
Quiz
Which animal's giant paws form the ancient gateway entrance to the Sigiriya fortress in Sri Lanka?
Quiz
How do visitors currently reach the remote Inca ruins of Choquequirao in Peru?
Quiz
How thick are the widest sections of the protective wall at Kumbhalgarh, India?