In the power of this waterfall, Alexander Hamilton saw the potential for industry.

These ruins of an octagonal stone school that was later used as an A.U.M.P. church exemplify a popular school design from the 1830s.

Only a few walls remain of the last church the Pilgrims used before they sailed to North America.

The highest waterfall in Italy is only "turned on" five times a year.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

The longest covered bridge in Delaware.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

One of the only memorials dedicated to journalists who died in combat.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

A serene plaza that commemorates one of the Granite State's most iconic figures.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

One of Gettysburg’s least visited battlefield memorials is off the beaten path, but worth a visit.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

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

This unassuming passageway played a key role in one of the most important events in U.S. history.

One of the oldest of its kind.

An Irish Memorial commemorating those who perished due to potato blight.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.