The house where John Wilkes Booth conspired with his co-conspirators.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A giant Troll lurks under one of Seattle's oldest bridges.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

This pun was simply waiting to come to life, and one defense contractor made it so.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

A beautiful opera house in the heart of Amazonia has recently restarted performances after a 90-year hiatus.

This striking, two-toned confluence of rivers is visible from space.

A museum dedicated to the history and exploration of both popular music and science fiction.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

Perhaps the world's only gas station inspired by a political scandal.

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

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.