The longest navigable underground river in the United States is home to countless blind and albino animals.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Symbolic attempt to overcome the issues of life.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

Veritable museum of 20th century country music history.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.

An enormous natural sandstone bridge in Kentucky.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

One of the few surviving "Wigwam"-themed motels.

An abandoned theme park with a strange and tumultuous past.

Prehistoric animals decorate this popular outdoor park.

Oldest and rarest examples of telecommunication in the world.

A wonderland of folk art including the World’s Largest Grit. 

The only subterranean ping pong table in Atlanta.

A real (but thankfully not live) missile stands tall as a monument to the United States military in the small town of Cordele.

A mysterious inscription may hold a clue about the "Lost Colony" of Roanoke.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

Secret gardens just a few miles from downtown Atlanta.

This folk art compound was built by a fortune teller on the advice of three people from the future.

A white oak with property rights.

Bad farming practices caused this unnatural natural wonder.