This church in Pittsburgh is home to the largest collection of religious relics in North America.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The stately remains of Llywelyn the Great's mighty fortress.

This historic national park is covered in the stunning ruins of red rock pueblos.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

One of the last Jazz Age "Wonder Theaters" in New York City.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The oldest inn in England served brew to the crusaders.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

A striking 12th-century-style castle built on the edge of a cliff.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

Lithuania's outdoor sculpture trail of wooden folk art.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.