There’s a hidden military meme engraved on the World War II Memorial.

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

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

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

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

The national park was once a plantation estate.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Every year, the colorful murals of Montreal get a complete makeover.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

A very big rock just plopped down in the New England woods.

More than 350 million years ago, western New York was covered in a vast sea. Today, you can dig up the remains of the plants and animals that lived there.

A safe place for the wild donkeys of a hot vacation destination.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

The graves of a Connecticut family thought to have been plagued by a vampire.

A miniature village lies nearly forgotten in the forest by the side of a major highway.