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

The final resting place of the man whose name has become synonymous with greatness.

The palace for King Gustav III was never completed, but the foundation remains tucked away in this city park.

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

Crystal chandeliers brighten up this dark underpass.

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

Despite dreams of constructing this fairytale mansion, Albert Gotthard Nestor Cedergren never saw its completion.

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

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

Sweden's oldest animated sign is still lighting up the skyline today.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

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

An entire shopping mall and industrial terrain named for the time the king of Sweden's car went into a ditch.

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

The site of Stockholm's last public execution.

The world's largest model of our planetary system.

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

This colossal war machine is now a living museum dedicated to underwater warfare.

An underground city of salt.

Museum dedicated to "the man who moved the Earth."

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

People in Poland have rallied to save this unnatural desert from being reclaimed by the forest.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.