2000 BC – 1907 ADToday's journey spans from the frozen cliffs of Lake Baikal to the sweltering jungles of Cambodia, testing your eye on monumental feats of engineering and the rugged landscapes that challenged them.
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Round 1 · 1450 AD
CasualConstruction of the Machu Picchu Estate
High in the Andes, Incan builders expertly shaped polished dry-stone walls without mortar to construct a royal estate for the emperor Pachacuti, which would later be abandoned during the Spanish Conquest.
Round 2 · 1560 AD
CasualBuilding St. Basil's Cathedral on Red Square
Commissioned by Ivan the Terrible to commemorate the capture of Kazan, this iconic cathedral's original design was entirely white brick with gold domes, lacking the vibrant colors added centuries later.
Round 3 · 300 AD
TrickyCreating the Hummingbird Nazca Line
The Nazca people created immense geoglyphs by removing the reddish-brown iron oxide-coated pebbles that cover the surface of the desert, revealing the light-colored earth underneath to form vast figures.
Round 4 · 1907 AD
ExpertRebuilding the Great Mosque of Djenné
The current Great Mosque is a massive reconstruction of an earlier medieval structure. French colonial administration supported the rebuilding using traditional Sudano-Sahelian mud-brick techniques and distinct palm-wood scaffolding.
Round 5 · 2000 BC
ExpertRituals at the Great Bath of Mohenjo-Daro
One of the world's earliest major urban centers, Mohenjo-Daro featured advanced urban planning, including standardized fired-brick architecture and a sophisticated drainage system that fed the watertight Great Bath.
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