A tree grown from astronaut seeds which were exposed to cosmic rays.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

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

This locally-famous crevasse in New York State is icy all year round.

The Liverpool street made famous by the Beatles is real.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

A small chapel celebrating the spiritual bond between dogs and humans.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

A one-of-a-kind collection of a unique medium.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.