Two pillars set 10 paces apart commemorate the "last notable American duel."

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

The rest of him lived another 61 years and was buried elsewhere.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Perhaps the most scandalous statue of America's first president.

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

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

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

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

The arch that celebrated the completion of the Lincoln and Victory highways.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This blowhole is supposedly caused by a trapped monster.

Race through the maze, get your name on the sign.

This working class sculpture pounds his hammer all the livelong day.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This sandstone mansion was the home of two of Oregon's most important pioneers.

Portlandia is the second-largest copper repoussé statue in the United States.

Tiny horses tethered to antique rings are scattered around the city.

A sculpture of a salmon swimming through a brick building.