The Tudor-style cottage in the middle of the square is not quite what it seems.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

This black church sits alone among a field of lava rock.

This beautiful, historic church looks like something out of a simpler past.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

The only museum with its curator—and her pets—buried inside.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

100 year tradition of fist fights, marked by marble footsteps.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

An ancient necropolis of magnificent tombs.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

The attic of a four-century-old canal house hides a clandestine church.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

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

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