An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

This house was once the location of Frelinghuysen University.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

A small Richmond island dotted with the remnants of hundreds of years of history.

A community of collapsing homes more than a mile out from the Florida coast.

Come for the waffles, stay for more waffles.

Visit the monolithic tomb of America's most famous general.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Try not to get slimed in Tribeca.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

The second oldest continuously operating bar in Louisiana.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

This New Orleans boutique and nursery specializes in rare flora, with a focus on carnivorous plants.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

Images chiseled into the basalt here date back an estimated 300 years.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

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.