Water

In the 16th century, a Franciscan monk pulled off a construction miracle by building a Roman-style aqueduct to save the town of Otumba, Mexico, from certain death.

Visit Europe's largest subterranean waterfall, carved by water from the glaciers of the towering peaks surrounding the valley.

Water gushes from the trunk of this miraculous mulberry tree about once a year.

An adorable intake tower with a “witch hat” stands in the Edo River.

In this recreational park, two artificial lakes share a surprising connection to Wembley Stadium.

A stunning waterfall in the mountains of Romania.

The ruins of a failed dam that was built over land later described as a "sponge."

This volcanic crater lake is renowned for its perfectly round shape, stunning blue-green waters, and unique geological properties.

A pile of earth left over from a water supply project was converted into an anti-aircraft installation during World War II.

An incredibly salty lake inside the crater of an extinct volcano.

One of London's lost rivers runs through a pipe over the tracks of this subway station.

The largest Spanish artifact built in the Philippines and one of the oldest underground reservoirs in the world.

A warning against "the demon drink" adorns the northwest entrance of Glasgow Green.

This whimsical statue marks the high water level from the Great Flood of 1993.

A memorial to the Indian victims of the devastating 1923 earthquake, built in glorious Mughal style.

Explore the flooded remains of a limestone mine in Kentucky.