The site of one of the largest prison escapes of World War II.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

A monument to the more than one million enslaved Africans deported from the port of Ouidah.

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

A beachside monolith shaped by years of waves crashing against hard quartz.

A 19th-century British industrialist built this Louis XIII–inspired chateau for his homesick French wife.

At Ramahyuck, the Gunaikurnai people were forced to trade their freedom and culture for protection. Today, a cemetery is all that remains of the site.

After World War II, this former concentration camp in Northern Italy became a refuge for those displaced by the war.

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

This abandoned mausoleum from 1815 sits deep within the forest surrounding Callendar House.

Mysterious stone faces line a hidden path great for seeing wildflowers, bird watching, and rock climbing.

The headquarters of the semiconductor giant has a 10,000-square-foot museum.

This ancient market is often referred to as the oldest shopping mall in the world.

An unusual heating plant that has garnered notoriety for its distinct shape.

This uniquely designed bridge served as the city gate for Comacchio.

A glimpse into the festive and private lives of medieval Europe.

This roadside memorial pays homage to Argentina's Outlaw Saint.

Constructed on the ruins of a convent, this tower saved countless lives.

A massive rock in the surf steeped in legends.

A Reformation-era fiery figurehead once denoted this location as a print shop.

Hidden within an idyllic suburban garden is a memorial dedicated to the victims of a terrifying spree of killings committed on U.S. soil.

The "Sultan of Swat" once attended a school at the site of this baseball field.

A 300-ship graveyard, with a few still visible at low tide.