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.

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

This small shop walked so America could run on Dunkin'.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

It’s not hard to see why the historic Peabody Conservatory of Music’s library has been described as a “cathedral of books.”

This Art Nouveau gate still stands at the former entrance of a 20th-century Spanish writer's colony.

The perfect spot for a picnic, right next to a giant ballistic missile.

We heard you like volcanoes so we put a volcano in your volcano so you can die for sure...

A mesmerizing amount of crazy art is attached to the side of this house on Seattle's Phinney Ridge, bringing smiles to those who venture down the driveway to take a look.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

See massive fossils that are over 200 million years old in northeastern Arizona.

Try not to get slimed in Tribeca.

This private residence was the template for one of the most beloved television homes of all time.

These vibrant row houses are a unique example of Baltimore kitsch.

Quite simply the largest tree in the world (by volume).

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

Climb 200 stairs up the tallest lighthouse on the West Coast for an unbeatable view.

This eclectic sculpture garden in Brooklyn, home to a bizarre collection of art, was once a run-down junkyard.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

Cryptic messages embedded in the New York City sidewalk.