Two New York rooftops are home to the largest rooftop soil farms in the world.

Nature and beauty amidst pollution and industrial wreckage.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

This secluded ruin was once a home for exotic plants.

This mysterious marker puzzles pedestrians and infuriates geographers.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Every color in the rainbow awaits.

An Aztec snake god has taken the material form of an apartment complex.

For just a few hours each morning, this market serves specialties from the city's shrinking Chinese-Indian community.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Elevated freight railway turned wildly successful urban park.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Read a book next to a Midtown waterfall.

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

Stretching for 22 miles, the world's longest tree-lined avenue dates back to the early 17th-century.

This massive redwood tree has a hole in the base big enough to drive through.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

An emerald-green grotto just a short trip from Austin.

Free public park and gardens filled with peacocks and peahens.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.