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

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

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

One of the world's first dedicated bank buildings in the world is now the oldest one.

This unique sculpture is often overlooked by pedestrians.

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

An entire shopping mall and industrial terrain named for the time the king of Sweden's car went into a ditch.

The palace for King Gustav III was never completed, but the foundation remains tucked away in this city park.

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

Crystal chandeliers brighten up this dark underpass.

Despite dreams of constructing this fairytale mansion, Albert Gotthard Nestor Cedergren never saw its completion.

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

This poured-concrete water reservoir is a gem of modernist architecture well-hidden in a city forest.

This railroad track was so secretive that it was omitted from all maps.

A traveling Bronze Age sacrificial stone that was used to honor elves, fairies, and other woodland spirits.

"Only the dead get off at Kymlinge."

A massive land art sculpture fills a green space once tarnished by a landfill.

Sweden's largest optical telescope sits on a rooftop in Stockholm.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

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

A surreal statue honoring Prague's favorite literary son.

Steadily reminding Czechia of its past.