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

This unique sculpture is often overlooked by pedestrians.

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

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

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

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

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

Frequent fliers welcome in this airplane hotel.

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

A former suicide bridge is now accumulating symbols of love instead of a body count.

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

The single richest source of elemental discoveries in the world.

"Only the dead get off at Kymlinge."

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

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

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

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

The world's largest model of our planetary system.

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.

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

The ruins of a 16th-century bridge loom over Olivença's sovereignty.

This abandoned fortress still stands guard over the Guadiana River despite a history of warfare.

A naturally occurring amphitheater carved by erosion into the mountainside.