This hidden natural fountain issues forth a steady supply of supposedly healing water that tastes like rotten eggs.

The only surviving leech house in the United Kingdom was a home for bloodsucking worms until the 1900s.

A solemn memorial in a majestic setting that honors a 1692 tragedy.

A monument with a strange legend involving a horse's tongue.

This historic abandoned train station looks like a stop for ghost trains.

A small alleyway with an unusual moniker.

This bridge once allowed Dere Street to cross the River Tees.

A sweet symbol marks the place where torturous executions were once carried out.

A very classy 1920s-era bar right in Grand Central Station.

This popular square's history as the former site of a church is right beneath your feet.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Follow the original medieval paths that wind through this intriguing section of the city.

An artist's cute bronze subway sculptures belie his violent artistic past.

Elevated freight railway turned wildly successful urban park.

This slender three-story building has also had several famous residents.

Phil Mortillaro uses keys to bring art back to the Village.

The home of the first American-born saint is one of the only curved buildings in New York.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

There must be a pun in this haystack somewhere...

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

A locomotive made from 185,000 bricks celebrates the town's pioneering railway history.

Manchester's abandoned train depot lingers in a post-industrial purgatory.