Sweden's first electric elevator remains hidden within a fortress-like building.

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

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

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

Stockholm's last remaining paternoster elevator.

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

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

Sound travels strangely in this underground whispering gallery.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

Frequent fliers welcome in this airplane hotel.

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

Stockholm's narrowest alley is barely over two feet wide.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Sweden's "good old days" painstakingly re-created in a model village.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's deepest subway station is also a stunning ecological wonder.

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

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Pizza with a side of fine art.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.