This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

The most confusing clock in New York.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Salute the leader of the proletariat.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

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

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

Civil War Fort on an island in the Boston Harbor.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

Millions of dollars worth of sculpture decorate this Iowa city center.

Once the site of speeding horses, now home to picnickers and public concerts.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

Golden Gate Park's historic collection of plants.

This massive redwood tree has a hole in the base big enough to drive through.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

A fine, large-aperture telescope available for public use.