"Mock all and sundry things, but leave the saints alone."

This landmark cemetery in Boston was created more than 300 years ago.

Narrowest house in Boston.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The oldest standing structure in downtown San Diego.

This historic graveyard was partially paved over to create a streetcar line.

A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

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

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

These free-roaming horses were once destined to disappear from the land.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

The largest and most well-preserved petroglyph site in the Verde Valley.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

This memorial includes fragments from one of the greatest tragedies in United States history.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

Theater has had many different incarnations but has survived the ravages of time.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

This awkward aquarium sculpture is one of the strangest statues in Chicago.