Hiding in plane sight.

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

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

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

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.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

These towering cliffs crystalize each winter, forming sheer walls of ice that are open for climbing.

Between a bike path and the South Platte River sits a piece of modern space history.

The final resting place of a 19th-century gold prospector and convicted cannibal.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

Inside the Bangor International Airport is a collection of military challenge coins.

This 1.5 million-gallon water tower inspired Stephen King while he was writing "It."

This is the sewer drain that was the inspiration for the opening scene of Stephen King’s classic novel “IT”.

The eccentric mansion of one of the most popular horror authors of modern times.

This massive solar system model is sprawled out across Maine's suburban wilderness.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

You’ll never see the sky the same way after visiting this art installation in Tempe.

A camera with an ongoing exposure time of 1,000 years.

The second oldest continuously operating bar in Louisiana.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

A museum and shop on Bourbon Street located in the French Quarter.

These subterranean models show Mexico City's central square during three different eras.