Stockholm's narrowest alley is barely over two feet wide.

One of the world's first dedicated bank buildings in the world is now the oldest one.

This monumental work of art symbolizes the coming together of a previously divided city.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

A domino effect created with Britain’s iconic telephone boxes.

This monumental gateway marks the northern edge of Brighton and is a welcome sign to all visitors to the seaside city.

The oldest working mechanical clock in the world.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

The last bastion of Roman presence north of the Alps looms over a German town.

Twisted buildings adorn the banks of the Rhine river.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

A striking symbol of the Bulgarian capital.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The "Seinfeld" diner.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.