This Roman arena once played host to bloody gladiatorial battles.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

This amazing piece of modern art honors the hundreds of fishermen killed during Cambrils' "year of misfortunes."

Check the time in 145 countries at once with this East German relic.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

A man has revenged his true love's betrayal through tears and stone genitalia.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Sweden's oldest animated sign is still lighting up the skyline today.

This unique sculpture is often overlooked by pedestrians.

Locals rallied to save this beloved mural after someone mistakenly attempted to cover it.

Frequent fliers welcome in this airplane hotel.

Sweden's oldest street has not changed for nearly a millennium.

A tiny town hall—in Sweden's one-time capital—might be the smallest in Europe.

A Swedish phone box converted into an informal village library.

A concrete mushroom that divided Stockholm residents for nearly a century.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

An abstract representation of weather in Sweden.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

It houses the remains of a 17th-century version of the Titanic.

The Swedish flag over this small naval fort signals that the nation is at peace.

It was meant to help transport wounded soldiers to a secret underground hospital.

The unique design of this former quarry provides ideal acoustics for concerts.

A memorial to the atrocities of the People's Socialist Republic of Albania.