The longest escalator in the Western Hemisphere takes over three minutes to ride down.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

There’s a special club house at the top for the bell ringers.

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

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

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

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

This popular pilgrimage site offers a hole filled with holy healing dirt.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

Statue commemorating the use of ether in anesthesia.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

The Boston square dedicated to the dark poet who was born nearby.

The site of Paul Revere's historic two lantern warning.

No one messes with the Massachusetts sacred cod, not this time...

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

This highest peak in New Mexico is named after an explorer who had a habit of lending his monicker to peaks.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.