The world's largest public collection of PEZ memorabilia.

Ruins of a historic medical facility sits eerily by the water.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

Celebrate the history of the rich and truly misunderstood relationship between man and pigeon.

This former mining town was named the most toxic town in America.

This 1920s Dutch barge is now a floating bookstore.

Banksy gives themself artistic license with this piece of London street art.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This "City of Books" holds a museum, library, and the complete personal book collections of five of Mexico's greatest thinkers.

This one-window stand has been home to a giant vat of slowly simmering meats and an array of unique tacos for almost 50 years.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

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

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

Part bookstore, part café, and part forest.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A Bibliophile's Dream.

Seattle's own bad art museum located inside Cafe Racer.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

This geothermal hot spring hides beneath a slowly growing mineral dome.