This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

World's first "penitentiary," meant to be humane, drove men insane.

Friction between grains of sand cause a curious "singing" sound.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Its columns were all carved from the same white oak tree.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This Art Deco theater is the last remaining opera house in the “little Broadway of the North.”

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

This riverfront statue honors the inventor of the first video games ever sold.

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This impressive Boston holy house is the American mecca for Christian scientists.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

Tragedy on Little Brewster Island memorialized.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.