This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A unique rock formation that only a few have managed to venture inside.

Copenhagen's celebrated theme park and gardens.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

The Bristol Camera Obscura housed in an ancient windmill.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

A 550-square-meter micro-nation off the coast of Britain.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

The Swedish flag over this small naval fort signals that the nation is at peace.

This simple roadside art installation ended up sparking a folk art movement and a controversy of international proportions.

Only electricity pylons carrying both AC and DC circuits.

The place to be if you love vintage Swedish cars.

The world's biggest floating museum in Gothenburg, Sweden.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

Dedicated to a song so popular the request to "Play Shoreline" became part of Swedish culture.

There are no crying babies in this neck of the woods.

This Swedish sculpture park is a unique combination of ancient ruins and modern art.

Iron Age grave stones and Viking burials, a short drive from Gothenburg.

This innocuous-looking button may have been used to assassinate a king.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

The unusually large seat sits atop the base of a ruined temple.

A delightful but little-known public observatory and planetarium in Munich.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.