This homestead was occupied by Union soldiers, who believed the owners were signaling Confederate forces.

This church is known as "The Home Church of George Washington and George Mason."

A merry-go-round that became a rallying point for the early Civil Rights Movement.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

These unusual rooms on wheels are holdovers from the 1960s.

One street divides a single town that stands in two U.S. states.

An oversized metal construction of Billy Tripp's moods going through life.

The "Jade Museum" is full of thousands of intricately carved works of art made from various precious stones.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

Largest Roman Catholic church in North America.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This twice-relocated "Usonian" home is among the smallest built by master architect Frank Lloyd Wright.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

A small museum celebrating the work of a Mississippi artist who had a unique connection with the natural world.

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

An original apothecary from 1792.

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

America's first federal monument.

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

A 16th-century artillery fort built to protect England against European invasion.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.