This tree is a living witness to the beginning of the Civil Rights Movement.

This old-fashioned carhop restaurant gave the world the waffle cone.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Amazingly detailed marble cinerary urns that once held the cremains of Roman elite.

The 40-foot-tall votive candle is the largest of its kind.

These boots are made for selfies.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

This parking garage was the site of what was - at the time - the largest cash robbery in history.

Two thousand artifacts from around the world collected by one woman who loved to travel.

One of the earliest and best-preserved buildings in Charles County, Maryland.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An astounding collection of medical specimens, including bits of President Lincoln.

The resting place of a Civil War celebrity's amputated limb.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

An eponymous directional signpost erected by the first president of the United States.

Outsider art meets paleontology at this roadside reptile repository.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Taste the white whiskey that the United States' first president once distilled and enjoyed.

A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.