One of the most scenic falls in Massachusetts has a history of death and grim legend.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Friction between grains of sand cause a curious "singing" sound.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Grandpa Rainbow felt the neighborhood needed some color, so he picked up a paintbrush and went to work.

Plot your trip through the city on the sidewalk.

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

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

From scholastic to sepulchral - now under reconstruction.

Become a prohibition rebel.

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

A hip bar decorated with walls of golden skulls.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

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

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