A luxuriant botanical garden below sea level.

The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

San Antonio's first 3-D stereoscopic mural is a trippy treat for the eyes.

Where manatees are the snowbird vacationers in these balmy Florida springs.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A monument to one of the few Olympic flames ever to be lit outside of the host city.

A historic canal winds through a unique, swampy landscape.

An abandoned munitions storage facility with a rich architectural history.

This quirky curiosity shop takes its cues from the world's bazaars.

Hidden amid the old-world charm of Savannah is a museum dedicated to the world of oddities and criminal history.

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

A roadside music shop featuring a confounding series of folk art installations.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

These early tent-shaped grave coverings are unique to Appalachia.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

People escaping slavery may have hidden inside a corpse vault.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.