An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

Off a hiking trail in Rhode Island stands a picturesque memorial to a long-forgotten war.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

As state highpoints go, this spot is one of the lowest, but for years it was also the hardest to climb.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Millions of numbers carved in glass represent the tattoos forced upon victims.

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

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

Stolen goods adorn the organ at Old North Church.

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

This statue intended for children to enjoy became a minor political spat.

Dedicated to one of the darkest moments in Irish history.

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.

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

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