One of the last remnants of an 18th-century fort in the business district of Mumbai.

A neglected and disused parking garage ramp has become home street artists to share their art.

A tiny town in an empty lot was the work of a local eight-year-old.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

A six-ton wedding present for the King of the Scots.

Illegal drag racing two stories beneath Chicago’s streets.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

The romance of early commercial flight still fills this Art Deco destination.

This steep slide at a kids’ playground went viral after an police officer tumbled down it.

Pick up a kebab and a credenza at this unique combination furniture store and café.

The French leader's hat sits in a glass case at the oldest restaurant in Paris.

Maine's oldest diner also happens to win acclaim for its elevated comfort food.

A mysterious stone embedded at the base of a historic Boston building.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

A stone marker commemorating the first time sound was transmitted over wires.

This statue intended for children to enjoy became a minor political spat.

Dedicated to one of the darkest moments in Irish history.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

A comprehensive collection of toy and model trains, largely from the mid-20th century.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

One of Jeff Koons’s largest sculptures and his first commemorative work.