The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This massive circular sculpture may not be a portal to other worlds, but it does inspire the mind to imagine them.

A moai decorated with the depiction of a European ship.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

One of the last of the great 1920s movie palaces is a Floridian Greco-Spanish-Persian dreamscape.

An emerald-green grotto just a short trip from Austin.

A huge musical instrument played by the ocean.

Historic funicular railway, believed to be the shortest railroad in the world.

This modern work of art was a refreshing addition to one of the oldest theatres in the city.

Odd outsider art installations surround a Gold Rush-era ghost town.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The ghostly remains of an accidental sea.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

An eerie natural formation that looks right back at you.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Designed to allow funerals to proceed over the River Dulnain.

A relief that wraps around the concourse of Los Angeles's World Trade Center marks one of the city's failed urban design plans.