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.

This restaurant proudly displays bread signed by the 39th president.

A 30-foot stack of piano keys memorializes one of the greatest keys players in jazz history.

This unique collection collects pieces of art etched into thin pieces of stone.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

Statue commemorating the use of ether in anesthesia.

Located in Faneuil Hall, the headquarters of the Ancient and Honorable Artillery Company of Massachusetts has stood the test of time.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

A centuries-old church stands as a testament to Boston's "father of architecture."

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

A mysterious stone embedded at the base of a historic Boston building.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

A single light illuminates one man's overshadowed contributions to street lamp history.

Abandoned since the 1950s, the streetcar lane beneath the heavily trafficked bridge lays empty and unused.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

The clothes-washing king doubles as a community center with some unusual features, including an aviary filled with finches.

Man-made geyser that rises to the exact height of the Gateway Arch.

A historic hotel library in Indiana hides more than a few secrets on its shelves.

This Indiana walk of fame honors music legends with record-shaped plaques in the pavement.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.