A layered tribute to the work of mosaicist Isaiah Zagar.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

An enormous, inside-out glass globe built in 1935.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Dramatic river bend surrounds a natural red-rocked pedestal.

On the Oregon coast there is a natural hole that seems to be draining the sea.

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

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

Rippling sand dunes frozen in the Arizona rock.

A huge musical instrument played by the ocean.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

An underwater city for the dead.

Where manatees are the snowbird vacationers in these balmy Florida springs.

One man's grief over the national tragedy has manifested in a pod of homemade whales on his front lawn.

Visitors are welcome to enter this lush Key West sanctuary to entertain its plethora of rescued parrots.

A tiny, unassuming park in Tampa that belongs to the Republic of Cuba.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

A building so large that it has its own weather.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.