Highly spherical boulders on the shores of New Zealand.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

A downtown park built on top of unclaimed graves.

A museum now occupies the mansion in Samoa where the prolific Scottish writer chose to spend the last years of his life.

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

New Zealand's epic shrine to all things puzzling.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The Bong-area park police have asked visitors to please, stop stealing the signs.

Wisconsin's most celebrated export gets the royal treatment on I-94.

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.

Australia's only intact colonial warship never saw action before being turned into a scenic wreck.

You'll find the little birds tucked within the rocks of this Australian beach.

The city’s oldest gateway to the galaxy lies at the entrance to the Royal Botanical Gardens.

This piece of Australian modern art is part joke and part history.

This historic tall ship traveled 1.5 million miles around the globe, and once did duty as the mythical pirate ship in Peter Pan.

A whimsical menagerie of creatures carved into a 300-year-old tree trunk.

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

A colorful street named for the legendary Australian rock band.