The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This ancient market is often referred to as the oldest shopping mall in the world.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

An alien church provides much needed silence in the midst of a Finland shopping center.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

The largest fountain in Bratislava.

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

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

The Guardian of Tallinn.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

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.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

2300-year-old Roman road connecting the empire.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This iconic high-rise residential block was one of the last to be built in the Brutalist style.