An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

Secret gardens just a few miles from downtown Atlanta.

The remains of one of America's first radiation testing grounds still rest ominously in a Georgia forest.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

Healing Springs that once ran red with soldiers' blood.

Where school buses go to die and be reborn as whimsical works of art.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

An underground magnet for ever-changing street art.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

Ruins of a Carnegie family mansion on Cumberland Island.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

Bad farming practices caused this unnatural natural wonder.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

This Florida arena, once host to "the fastest game in the world," has sat empty for 25 years.

This former prison is an Art Deco masterpiece with a past full of civil rights flashpoints.

The haunting remains of a failed housing development can still be found behind the big box stores that were to anchor them.