Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

This replica of the Greek structure is in the heart of Nashville.

This small, unassuming street is now a canvas for color and creativity.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A self-built castle made by a mysterious man.

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

The romance of early commercial flight still fills this Art Deco destination.

Largest Roman Catholic church in North America.

The site of the climactic scene from the classic horror film is now a historic landmark.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

The oldest continuously operating fish market in the United States.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Washington's iconic carousel has a nice piece of Civil Rights history.

The district's only illusionarium supports free writing programs for local students with every purchase.