Venue for strange sideshow displays and musical acts.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The sign at the garden gate reads: "These Plants Can Kill."

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A snapshot of the city's fascinating voodoo culture.

A crumbling hospital from the 1850s on Roosevelt Island.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A floating cat sanctuary on an Amsterdam canal.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

The hallucinogenic center of the ancient world.

At this unusual park, domes, ladders, chairs, and more are made from trees.