One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

This cave was once thought to be a hiding place for the devil.

This American Sycamore was grown from seeds that accompanied the Apollo 14 mission in 1971.

Dedicated to a local cow who escaped a slaughterhouse and became an international symbol of peace.

A small burial ground honoring Native American veterans of the Revolutionary War.

This historic Massachusetts tavern played a critical role in the start of the American Revolution.

No one really knows how these old hobby horses got here, but the herd keeps growing.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

An unrecognized nation-state created in the 1820s to avoid taxes.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

This surprising museum tells the story of modern Malaysia through the history of its law enforcement.

America's first federal monument.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

An original apothecary from 1792.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

The narrowest house in America is seven feet of pure spite.

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

The last remains of one of the oldest and largest oak trees in the United States calls this state park home.