A giant steel sculpture with animals in its shadows.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

One of the largest public collection of historic armored and military vehicles in North America.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

The home of an antique carousel still in operation.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

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

This former maximum-security prison is creepy, sobering, and supposedly haunted.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Live long and prosper in Tennessee.

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

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

The first full-scale tunnel built in America is short but scenic.

This replica of the Greek structure is in the heart of Nashville.

It may take some time to locate, but it's sure to warm even a heart of stone.

The site of the one of the most deadly train wrecks in American history.

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

Dinosaurs invade a suburban Nashville neighborhood.

This defunct, fortress-like prison has been the setting for several movies.

This seasonal soft serve shack has been doling out silky swirls since 1951.