Hundreds of hidden passageways weave through the old quarters of Lyon.

A dozen U.S. presidents have stayed at the historic resort, which was known as James Buchanan’s “Summer White House” from 1857-1861.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

One man's swirling six-acre monument of stone.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A peaceful international sculpture garden in upstate New York.