For centuries this cliffside aqueduct was believed to be of Roman origin, but it actually dates to the medieval era.

A Swiss amusement park entirely dedicated to the theory of ancient astronauts.

The World Wide Web was created in this nondescript corridor at CERN.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

Winston Churchill painted this lake during his stay Woolsack Castle in the Landes forest.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

A museum dedicated to one of Portugal's most celebrated writers.

This little museum is packed with information about the region's past and present biodiversity.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

These magnificent 240-year-old machines are considered distant ancestors of the computer.