A plaque at the lighthouse where Frederick Valentich made his last radio contact before he vanished without a trace.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

This arch made out of whale bones is a remnant of South Africa's whaling history.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

This midcentury LA bar was the birthplace of tiki culture.

For over 100 years, this Indiana town has had a tree growing out the top of the local courthouse.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Inspired by a piece of concrete, these three pyramid-shaped buildings have been beloved Indianapolis landmarks for over 50 years.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

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

Giant topiary dog once played a role in a terrorist bomb plot.

The largest shot tower in Australia is a unique reminder of industrial ammunitions history.

More than 100 colorful residents stand post in this seaside Australian city.

This previously dilapidated alleyway has been transformed into one of Melbourne's finest hidden art locations.

The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.

At 238 feet above the bottom of a gorge this span is known as the biggest thrill on the road to McCarthy.

The ghostly remains of what was once the world's richest copper mine.

A building so large that it has its own weather.

Electrical pylon in the shape of Disney's beloved mouse.

This small beachside park commemorates the possibilities of discovery.

A monument celebrating the idea of reaching inaccessible places.