Elevated freight railway turned wildly successful urban park.

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

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

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

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

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

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Rippling sand dunes frozen in the Arizona rock.

A terrific purveyor of natural history objects and curios.

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

An exotic reptile facility showcasing some of the rarest, most venomous snakes in the world.

This handcrafted, old western-style town is filled with deserted cars, retired movie props, and other forms of Americana.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

Wander through more than 20,000 square feet filled with an amazing collection of orchids.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

This Transylvania County city is home to a rare white squirrel population that is descended from an escaped carnival animal.

A mailbox that saved a nature reserve.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This bridge is haunted by the ghost of a distraught mother.