The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

A hugely vast Irish landscape of barren rock that stretches for miles.

An abandoned faux-pub made famous by a Guinness commercial.

This beautiful site is where the first transatlantic telegraph was sent from.

Petrified footprints of one of the very first vertebrates to walk on land.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.

A once grand hotel is being retaken by the wilderness it once capitalized on.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

The maritime museum that boasts the largest nautical library in the western hemisphere.

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

The Cadillac Ranch for monster truck aficionados.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

A building so large that it has its own weather.

The world's largest private aircraft collection.

An octet of classic chrome trailers speared into the ground act as a tribute to the silver bullets of the open road.

The highest point in Florida is still the lowest high point in the country.

The highest point in South Carolina was once owned by an energy company that neglected it but now the state is taking it back.