How often would the Inca replace the bridges?
Previously, the communities replaced the bridge once every three years. But as increased accessibility and tourism have brought more visitors to the area, they have increased the frequency to once a year.
When was the Inca suspension bridge built?
Ochsendorf believes that Inca bridges may have first been developed in the 13th century.
How many Inca bridges are left?
Today, there is just one Incan grass bridge left, the keshwa chaca, a sagging 90-foot span that stretches between two sides of a steep gorge, near Huinchiri, Peru.