A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

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

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

Visit this playground of waterfalls, caves and sinkholes.

This structure among the trees was the result of divine inspiration.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

A series of playful yellow penguins share a serious message about the environment.

This glacier interpretation center houses the world’s only bar made completely from glacial ice.

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

Macabre museum devoted to historical Viennese murders.

A spherical "micro-nation" in the heart of Vienna.

Baroque celebration of the end of the Great Plague of Vienna.

One of the best collections of wax anatomical models in the world.

Annual technopop celebration of peace and love.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Physicist’s epitaph provides final confirmation to a career of turmoil.

Museum devoted to the artificial language of Esperanto.

A gigantic collection of teeny, tiny books.

Thousands of small machines line the shelves of this personal collection which definitely delivers on its name.

The world's largest collection of preserved trolleybuses.

This collection of French root art looks like an indoor fairy wonderland.