Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

This sprawling, Brutalist estate feels like a city within a city.

Down a pint of ale where the Bishop of Ely's servants slept in 1546.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

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

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

One of London’s rare Tudor-era buildings is a fate-defying gatehouse for a church.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Paris' linguistic guide to the international language of, yes, love.

This building served as the first customs house in modern Greece.

Public water fountains built during the Ottoman Era still stand throughout this seaside town.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The most easterly point on mainland Australia offers dramatic ocean views.

Come for the flowers, stay for the bats!

Hidden within Sydney’s lush Royal Botanic Garden is a walled cactus rockery and the site of Australia's first zoo.

A 19th-century perch for spotting sailing ships now boasts one of the most iconic views in the Southern Hemisphere.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.