Charleston's historic city jail once held everyone from pirates to Civil War POWs.

A spiral staircase twists to the top of this unusual Czech lookout tower.

A cozy cafe tells the remarkable story of how one man started with a little red paperclip and wound up with an entire house.

This Seattle museum displays the history of the telephone through an impressive collection of telecom equipment.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

An alien landscape on the banks of the Aegean Sea.

The hidden lair of an alchemist rediscovered in a 2002 flood.

These medieval ruins have survived since the 12th century, even providing shelter from the Nazis.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The so-called "Richest Village In China" is either a model Communist town or a dystopian sham.

This natural sea cave hides a small wonderland of natural turquoise beauty.

The world's largest reflecting pool is just two centimeters deep.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

The last woman executed for witchcraft in Europe is remembered in this Swiss museum.

A desert that evokes the surreal.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

No longer the only, but definitely the oldest, fountain in Greenland.