A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

This beautiful ridge-top trail is dotted by tiny homes apparently built by a group of itinerant fairies.

This Pringle-shaped ledge makes for the perfect photo op.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

San Diego's most historic and haunted home.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

A couple turned their front yard into an artistic masterpiece.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

A living archive of urban activism and space reclaimed.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

New York's oldest magic store.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Read a book next to a Midtown waterfall.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.