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

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

This colorful statue welcomes visitors to a Barcelona park.

Gustave Eiffel's masterpiece until the Eiffel Tower was built.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This towering church is home to a world-famous organ and a treasure trove of medieval art.

A solid steel plane designed to catch fire over and over again.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A gigantic mechanical bull rages over unsuspecting passengers at Birmingham’s central station.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

This massive memorial commemorates those who died in the Manchester Arena bombing.

One part local history, 99 parts gruesome haunted house.

This ancient Egyptian obelisk still bears the wounds of World War I.

A spectacular Neoclassical palace is home more than 15,000 artifacts and works of art.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

Rest stops along this pathway offer some of the best views of the Acropolis of Athens.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

This armored vehicle was built in the local shipyard for use by the defenders of Dubrovnik.

This seven-sided Romanesque chapel is regarded as the oldest building in Rovinj.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Inspired by the Rialto Bridge in Venice, these three clustered bridges were just one part of a Slovenian architect’s grand vision.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Spitfire airplanes with butterfly wings hover over Prague’s skyline.