A semi-scholarly approach to sex.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

A single light illuminates one man's overshadowed contributions to street lamp history.

A 60-room castle constructed by a horse-racing heir.

The oldest still-operating tavern in the United States was once owned by a pirate.

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

At 207 feet, one of the world's longest continuous escalators.

The rogue roots are gradually consuming some of the historic marble grave markers.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

The school tested mustard gas for the U.S. Army during World War I.

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

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

The narrowest house in America is seven feet of pure spite.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

A former major munitions plant that has been converted into a sprawling art space.