The colorful stairs are made with marble from the world's major quarries.

A seaside town with no sea in sight.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

Featuring the the longest lift span of any vertical-lift bridge in the world.

These medicine cabinet staples are part of the museum's collection of everyday objects.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

New York City's only radical feminist independent bookstore.

The house where the writer spent his formative years.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

This enormous, elaborate tomb looks oddly out of place next to a suburban Edinburgh bowling club.

These planks were originally installed to hold the dead.

The only home of the famous French impressionist painter open to the public is now a museum and bed and breakfast.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

All that remains of the once-booming chain is a single orange-roofed restaurant.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

A tiny chapel perched along a 14th-century bridge.