The last Incan suspension bridge is made entirely of grass and woven by hand.

This Incan Suspension Bridge Made of Grass Is Rebuilt by Hand Every Single Year - Interesting Engineering

Traditional rebuilding of the Q'eswachaka Bridge - LimaEasy

Dizzying Inca Rope Bridges Were Grass-Made Marvels of Engineering

Inca technology - Wikipedia

Center for Plants & Culture on Instagram: The Q'eswachaka bridge… Located in Peru, this incredible bridge dates back to the Inca empire and is rebuilt yearly using only grass and human power.

Connecting the Inca Empire: the art of maintaining Central Andean suspension bridges – The Past

Horse Riding Cusco - FRONTIERLAB

Qeswachaka Bridge Day Tour

Peru's Incan Rope Bridges Are Hanging by a Thread – SAPIENS

Qeswachaca Inca Bridge: Full-Day Scenic Exploration in Less-Traveled Cusco Region: Book Tours & Activities at