When a conglomerate of visionary startups commandeer a disused Greek Orthodox Church, zaniness ensues.

Crystal chandeliers brighten up this dark underpass.

This tree was once used to calculate the decrease of the Baltic Sea.

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

Wooden cutouts of the fictional family from the popular Swedish comic strip take a stroll along the side of the road.

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

The three colorful women depict characters from a beloved children's story.

What looks like a birch tree smushed between two pieces of glass often confounds commuters.

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

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

A wooden street sign is the last remnant of this 400-year-old alleyway.

A 12th-century church with a medieval fresco and an intriguing “Greek runestone.”

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

Located in an old church, this brewery produces a different kind of holy water.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

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

An ancient Viking runestone hidden in plain view in Stockholm's old town.

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

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.