The mall's looks were inspired by the cowboy extras who used to meet up—and cause real trouble—at this Hollywood hub.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.

A mosaic map made of over 100,000 tiles depicts the geological features and sea creatures that live along this San Diego beachside community.

The overgrown ruins of a once thriving World War I-era copper mine.

A 130-year-old urinal is the oldest of Stockholm and perhaps all of Sweden.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

Stockholm's tiniest statue is of a small boy looking at the Moon.

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

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Copenhagen's celebrated theme park and gardens.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

Where condemned pirates met their grisly end at the gallows on the River Thames.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Experience what life was like in Ireland during the Viking and medieval ages.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

An architectural oddity hides in plain sight on this iconic London bridge.

Rebuilt remains of a temple to Roman god Mithras.

Public access to clean drinking water was an instant hit among the masses.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

At this cozy bar tucked down a hidden Galway backroad, Guinness makes the Gaelic come out.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.