In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

These giant metal horses graze on a hilltop near the Montana highway.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

A climbing route in the mountains of Italy’s Dolomites, built for soldiers during World War I.

A beautifully well-preserved ancient Roman villa.

Ancient snack bar of the Roman Empire re-opened.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

This cemetery features modernist statues as strange as its name.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

These two delightful animal-shaped buildings host a visitor center and wool shop.

The glacier tucked within a New Zealand rainforest.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A perfect turquoise lake colored with glacier dust.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

The most isolated mailbox in America lets desert travelers record their passing.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.