Look closely and you’ll notice that the color changes a third of the way up the tower.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The U.S. Fish Commission’s effort to mass produce carp.

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

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

What began as an art installation is now the private drinkhaüs for a brewery's employees.

These old doors are covered in the signatures of Rehoboth Beach artists dating back to the 1930s.

A remote hill on a stretch of country road where the laws of physics are defied... or so it seems.

Stairs often replace streets on the steep slopes of this old mining town.

A collection of 1,300 accordions of all shapes and sizes displayed in chronological order.

The world’s largest collection of angel figurines includes 600 black angels donated by Oprah Winfrey.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

The birthplace of a titan of American cinema.

Statue dedicated to the star of an old television show.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

A bypass decorated with large wooden troll carvings.

A large circus museum with summer performances.

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

More than 5,000 contemporary and "historic" mustards from around the world.