This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Unrepaired walls from a 1920 anarchist bomb attack.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Lie in a hammock where George Washington stood.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

Dozens of lights dangle from the branches of what may be the brightest tree in Los Angeles.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A Nevada mining boomtown that ran out of silver and luck.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

Little Red Lighthouse under the George Washington Bridge.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

An errant donkey ushered in a new era of mining in Nevada.

Get a taste of the Wild West and a glimpse into the gold rush in Goldfield's oldest continually-running business.

Back in the day everyone who was anyone played this historic western theater.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

This tiny cluster of abandoned buildings looks like the future of the ghost town - today!