Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Frida Kahlo's childhood home, now a museum of her life and works.

A prison-like structure guards the remains of a notorious Old West outlaw.

A hardware store Buddha statue installed to deter vandalism wound up attracting Vietnamese immigrants who came to pray.

An abandoned convention space that has been left to the homeless and the radical.

This former luxury resort in Kaua'i is now an abandoned relic.

Reverend Franzo Wayne King administers spiritual enlightenment through the music of the jazz legend.

Radioactivity still cause for concern at this urban explorer's paradise.

This 19th-century church is now a popular roller rink.

The only theatre in the world constructed specifically for sound movement.

A secret climbing tree hides along the side of a Costa Rican road.

The words of the neighborhood's most famous poets adorn four concrete walls.

Founded by a high school teacher, this poetry magazine became a center for all things literary.

Opened as part of the New Deal, the training facility now features World War II-era structures and a pylon that once stood at the World Trade Center.

Formerly Fire Station No. 27, the museum is a hidden gem in the heart of Hollywood.

The blinking light atop the iconic landmark has been sending secret messages for decades.

Behind legendary Meltdown Comics is a marker for an engineered musical roadway of the Tehachapi, the great road builders of Kcymaerxthaere.

A beautiful memorial tells the story of a formerly enslaved woman whose kindness shaped a burgeoning city.

Inside this clubhouse is a cinephile's paradise.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.