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

World's most expensive home.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

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

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

One of the last remaining movie theatres in the country that features a rear-projection system.

One of America's most historic homes also holds a startling literary legacy.

A small plaque promises cold, hard cash in exchange for work by the famous pop artist.

This beautiful 16th-century necropolis marks an astonishing feat in heritage conservation.

A startling, centuries-old subterranean marvel hides in plain sight.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

A historic arena where the Beatles played their first concert in the U.S.

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

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

This beautiful Cape Cod beach offers dazzling views and an interesting historical footnote.

The Cape Cod house that whaling built.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

Take a break from all the boring business of death at this funeral home mini-golf course.

The Lowcountry color with the power to stop evil from entering a home.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.