A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

A Canadian port town is oddly home to two of the largest tree burls in the world.

This towering totem holds the title for the tallest in the world but only according to some.

Self-sufficient greenhouse floating on the Hudson River.

A waterway covered over after the Industrial Revolution has been unearthed and cleaned up, for the enjoyment of fish and humans alike.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The real-life site of Ichabod Crane's infamous gourd attack.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

New York City's smallest piece of private property.

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

Hear the tales of New York's most notorious criminals.

This Russian bar-restaurant lies within a three-story underground bathhouse.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.