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

The platform atop this verdant volcano was built with the help of a royal elephant.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

Hiding in plane sight.

An ode to one of the first concerts broadcast via satellite.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

The most loyal of little dogs, or a Victorian era publicity stunt?

360° views of the city plus five floors of optical illusions and hands-on science.

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

This nearly abandoned town was once a thriving mining community until a series of fires.

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

The world's largest reflecting pool is just two centimeters deep.

Geothermal waterfalls in Tuscany.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

A mega theme park-wax museum mélange containing all things biblical.

Five candy-colored villages on the Italian Riviera.

America's first wax museum opened in 1948.

One of the oldest, tallest, and most haunted lighthouses in America.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.