Few would expect the world's oldest preserved oil refinery to be found in Sweden.

This luxury hotel suite is located deep in the bowels of an old mine.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

Sweden's oldest street has not changed for nearly a millennium.

The final resting place of the father of modern biological taxonomy.

The second oldest anatomical theater is housed in a museum of curiosities.

The second-largest collection of runic calendar staffs in Sweden.

The first thermometer made with the almost-universal temperature scale is backwards.

A large collection of ancient runestones decorates this university courtyard.

Legend says this fabled well held part of a mythical Norse tree.

The official meeting point for the oddly named governing assembly of ancient Sweden.

Ancient burial grounds of the wealthy.

A small church in Uppsala hides the grave of a renowned 18th-century astronomer.

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

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.

The suspected burial mound of legendary Viking Björn Ironside.

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

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

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

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

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

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

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