This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Ice cream stand, snack bar, and time capsule of milk conveyance.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

An artist's cute bronze subway sculptures belie his violent artistic past.

The "Seinfeld" diner.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

The final resting place of President Chester A. Arthur and hundreds of others from Revolutionary War soldiers to poets, politicians, and painters.

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

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

The modern birthplace of Irish freedom.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

A particularly disconcerting tribute to Irish martyrs.

One of Ireland's most infamous prisons for rebels including men, women and children.