A modernist landscape of water and sci-fi concrete.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

An emerald-green grotto just a short trip from Austin.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

These abandoned grain silos and tunnels are an urban exploration dream.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This shop for all your super spy needs hides an educational secret.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

An enormous goose sits atop this nest-shaped home.

Thousands of unique minerals, including some of the most impressive fluorite crystals in the world.

An enormous natural sandstone bridge in Kentucky.

An abandoned theme park with a strange and tumultuous past.

Prehistoric animals decorate this popular outdoor park.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The world's longest known cave system.

Patrick Dougherty's fantastic living tree sculptures, mind-blowing but temporary.

Both funky and traditional, it's the oldest of its kind in Indiana.

Indiana's oldest sternwheel paddleboat has been plying the placid waters of Webster Lake for 90 years.

Enjoy classic musicals with a home-cooked meal at this former staple of American social life.

This turn of the century jail once held Charles Manson.

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.