This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

Combination beer garden and music venue in the heart of Wicker Park.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

A popular Icelandic children's story comes to life inside this cave.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

The oldest standing structure in downtown San Diego.

San Diego's most historic and haunted home.

An inconspicuous footbridge beloved by San Diego locals.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Paths are maintained, but trees have taken over plots.

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