Of course Salvador Dalí lived in a castle...

Finland's oldest astronomical observatory once played a crucial role in seafaring and timekeeping.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Decrepit Victorian public lift is a white-knuckle ride.

Once overlooking the town, this church now resides on a permanent tilt.

This stone obelisk is a relic of the 17th-century Swedish mile markers.

The suspected burial mound of legendary Viking Björn Ironside.

Tucked away in a downtown Stockholm park are the remains of a World War II defense position.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

A former suicide bridge is now accumulating symbols of love instead of a body count.

It's always game time at Stockholm's only museum devoted solely to video games.

The library's graceful rotunda is like a bibliophile's temple.

This Stockholm light tower can be controlled by anyone with a smartphone.

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

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

The fake World Cup prize was secretly created after the first one was stolen in 1966.

This fresco inside a Serbian cave church has been a source of disagreement.

The shell of a medieval fortress offers commanding views of the area it once protected.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

An eerie, derelict amusement park in Berlin.