This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

It houses the remains of a 17th-century version of the Titanic.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The place to be if you love vintage Swedish cars.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

Home to three historic ships from the age of Vikings.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

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

A little Lady Liberty stands in the Norway town where the copper for the real thing came from.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

Walk behind a 50-meter-high waterfall.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.