A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

A larger-than-life monument to the inventor of the Bunsen burner.

The United States' only educational center specializing in disease vectors and mosquitoes.

The highest point in Washington state is a volcano covered in glaciers.

Stroll through a wonderland of stupendous moss-covered trees.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

Step aboard the first ship to circumnavigate North America.

A 1,000-foot-long railroad tunnel under Shavers Fork connected the towns during West Virginia's logging boom until its closure in 1985.

A small hippo-shaped fountain in Berlin, Germany.

This landmark vessel dry-berthed in Tacoma's harbor served in emergencies and ceremonies for more than 50 years.

At a rest stop north of Seattle, you can drive through the trunk of an ancient tree.

Thomas Dambo's troll sculpture wears a crown with birdhouses on his head.

In an alcove of this historic library, you can find murals painted in the 1930s by an artist who went on to create some of Disney's most iconic animated films.

Sweet or salty, super hot or mixed into beer, this is the holy land for all things licorice.

A normal, unassuming pedestrian overpass has been the demise of many, many trucks.

This original Mason-Dixon line cairn placed in the 1760s was put in the wrong location because of the gravitational pull of the Allegheny Mountains.

After James Madison's death, his wife and former First Lady Dolley Madison lived in this yellow building near the White House.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A local prank turned town icon.

One of the few remaining covered bridges in Lancaster County.

A winding, cliffside stretch of road overlooking the Delaware River.

This abandoned iron furnace was one of the first to use coke—a type of high-carbon fuel—to make iron.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.