The site of Paul Revere's historic two lantern warning.

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

The Boston square dedicated to the dark poet who was born nearby.

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

This small, unassuming street is now a canvas for color and creativity.

Millions of years of erosion created the feature for which this rock formation is aptly named.

Named after an outlaw who used the basin as a hideout.

Experience a charming 1930's version of "infotainment."

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

An exotic wildlife habitat right off The Strip.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

This massive airship factory is so large that it has its own indoor weather.

The home of the first American-born saint is one of the only curved buildings in New York.

The ruins of a monastery that dates to the 7th century.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A hugely vast Irish landscape of barren rock that stretches for miles.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A stunning Victorian abbey and walled garden on a lakefront.