The fountain marks the area where hundreds of accused witches were burned at the stake.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

The trials and tribulations of marking Poe's grave.

The first dish to bounce radio signals off the Moon, it was the forerunner to the U.S. Space Program.

This water tower commemorates the invention of the transistor on this site in 1947.

This giant satellite antenna services the transmission needs of government agencies and cable programmers.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This tiny patch of arid sand sits in one of the greenest states in the United States.