The fastest way to send a message before electricity was invented.

Maybe the only restaurant in the world where your seat will be signed by a Nobel laureate.

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

The site of Stockholm's last public execution.

It was meant to help transport wounded soldiers to a secret underground hospital.

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

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

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

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

Naturally formed rock city in Poland.

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

The center of Stockholm can be found along this quiet street.

One of the world's oldest continuously operating meteorological stations sits on a hill in Stockholm.

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

You can still find treasures on the pebbly beaches of one of the world's oldest jade-producing areas.

If there is one thing you don't want to be in Sweden during Christmas, it's a Yule Goat.

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

The 43-mile route crosses through six islands with gorgeous views of the Seto Inland Sea.

Cabaret where the show girls are all androids, and the patrons couldn't be more pleased.

A 20-meter (65-foot) robot towers over Tokyo Bay.

This neighborhood thoroughfare is haunted by dozens of homemade monsters.

A surreal museum of extraordinary industrial objects.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

To enter the lower hall of this temple, you must first walk through a dragon.