This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

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

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

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

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

The land is home to swimming ponies and a legendary 18th-century treasure.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

America's first federal monument.

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

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

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.