2026/6/1 · 9:07
Machu Picchu: How the Inca Built a Cloud City With No Mortar, No Iron, and No Wheels
Machu Picchu: Inca dry-stone masonry, no mortar, earthquake-proof, 2,430m above the clouds.
A daily 1-minute video series uncovering how the world's most iconic structures were built — from ancient wonders to modern skyscrapers.
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