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.

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

A Swedish university commemorates the former U.S. President’s bathroom visit with a gold plaque.

Inside this church, a monument honors the first burial site of the famed philosopher.

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

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

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

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

Stockholm's tiniest statue is of a small boy looking at the Moon.

A 130-year-old urinal is the oldest of Stockholm and perhaps all of Sweden.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

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

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

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

A heated statue pays tribute to one of Sweden's great actresses.

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.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

This sculptural representation of an Andersen fairy tale had to be pushed away for being too grim.

Copenhagen's "other" little mermaid marks the historic location of past sea maid sightings.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.