Four-story concrete hotel never opened to customers.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This floating sculpture of ice is a poignant reminder of nature's power.

Walk behind a 50-meter-high waterfall.

Watch a magnificent, ever-changing colorscape inside James Turrell's immersive work of art.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

The world's most active stratovolcano is almost always erupting.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

A Viking man's tribute to his brother stands in Gävle's oldest church.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

Northern Ireland's Brobdingnagian stepping stones.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

Not quite the menace it once was, this monster still has some chops.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This chimerical bridge/tunnel appears to dead end right into the sea.

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

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The largest of the Fuji Five Lakes is home to an impressive swan population—some real, some with paddles, and one with an observation deck.