Although rarely used, there is still a hidden room for the royal family at the Stockholm central station.

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

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

The single richest source of elemental discoveries in the world.

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

"Only the dead get off at Kymlinge."

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

The world's oldest individual clonal tree looks like a wimp despite standing tall for 9,550 years.

A floating underwater hotel, created by a Swedish artist.

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

The internet as provided by a James Bond villain.

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

Crooked windswept pines give this old forest an enchanted and magical look.

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

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

The world's first ice hotel is still one of the most elaborate and beautiful.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

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.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.