Healing Springs that once ran red with soldiers' blood.

Tour the sci-fi-esque reality of governmental disease management.

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Home of an evil witch famous within southern folklore.

Curious cave that stays a cool 56 degrees all year long.

Every last book in this bookstore is signed by the author.

Where America's first doomsday cult awaited the end of the world.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The first declared National Monument in the United States.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

On Japan's Tashirojima Island, cats are king.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

An underwater city for the dead.

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

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

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

Only known mainland rookery of the threatened Stellar sea lion.