A long-disputed lighthouse built on the wrong side of a Finnish/Swedish island.

The 19th-century home of Count and Countess von Hallwyl is now a museum.

Twice a year, this floating library delivers thousands of books to the remote islands of Stockholm’s archipelago.

A tombstone on the grounds of the royal castle marks the burial site of a Swedish king's beloved dog.

An ancient tree that was once the favorite of a young Swedish royal.

A Japanese video game arcade hides in the back of a Swedish pool hall.

A simple stone remembers one of the most menacing horses in the Swedish military.

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

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

A collection of trees from various corners of the world call Stockholm University home.

The apartment where Pippi Longstocking came to life.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

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

The center of Stockholm can be found along this quiet street.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

A decommissioned submarine base makes a great space for graffiti art.

Hundreds of unusual wheel crosses poke above the earth in this small Estonian cemetery.

Legend has it that not even Stalin could pull down the 2015 European Tree of the Year.

This behemoth bovine guards an Estonian town and is a memorial to the lost species.

Abandoned Soviet base once stocked with short and medium range missiles pointed at western Europe.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

This abandoned fighter jet launch center is now a haunting street racing course.

Tombstones buried in overgrown grass mark the deceased occupants of this abandoned graveyard.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.