Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

New York's oldest magic store.

An Italian vineyard invites religious pilgrims to stop by 24/7 to get their drink on, for free.

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

Leave the wardrobes and sweets to British schoolchildren, Shanghai's got a Coke machine that leads to booze.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

The headquarters of a secretive order is also a beautifully-designed park.

This massive library holds what was once the largest book collection in the world.

This innocent-looking townhome is actually a subway exit.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

A long-disputed island that Denmark and Canada claim by periodically alternating flags and bottles of liquor.

A unique attraction and museum dedicated to exploring iconic roadside structures.

The longest burning light bulb in the world.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A preserved dragon's rib that remembers the legend of the founding of the city of Atessa.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

Some of the world's only freshwater seals live in one very special lake in Russia.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

Boise State's stadium was the first non-green football field in the world.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.