A blast from the past in central San Diego.

San Diego's most historic and haunted home.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

The world’s oldest active sailing ship.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

The world's largest collection of the world's largest objects is in one small Illinois town.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

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

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Look closely and you’ll notice that the color changes a third of the way up the tower.

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

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

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

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

This lovely pocket park is one of the most under appreciated in D.C.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

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.

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

The location where the American Revolution ended.

A small cave with a larger-than-life legend.

This museum explores the grim reality of life in the earliest British colonies in America.