Manatees congregate around a power plant's discharge canal where the water is especially warm.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

A clone of a cloned tree that was so important it allegedly had its own guards.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Time travel with sweets across history at this research-based candy store.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.

Located in Faneuil Hall, the headquarters of the Ancient and Honorable Artillery Company of Massachusetts has stood the test of time.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

This free, take-a-book shop seems like a trick but isn't.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

An eerie, decaying ghost town destined to fade into the forest.

Outsider art meets paleontology at this roadside reptile repository.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

Bizarre Cavern.

"X" marks the spot of an echo chamber in the middle of a plaza.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.