Frequent fliers welcome in this airplane hotel.

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

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

It houses the remains of a 17th-century version of the Titanic.

Early habitat dioramas and home of the elusive gaff, the skvader.

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

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

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.

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

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

Hidden in plain sight, Sweden's official ordnance datum is now abandoned.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

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

Stockholm's deepest subway station is also a stunning ecological wonder.

The library's graceful rotunda is like a bibliophile's temple.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

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