This small West Virginia park is a land trust holdout against mountaintop removal mining.

A memorial in coal country commemorates the victims of an all-too-preventable mining disaster.

Visit a replica of the estate where Aaron Burr allegedly plotted a treasonous scheme against the United States.

Once home to a booming 19th-century oil town, the park now houses a World War II submarine memorial complete with a torpedo.

Home to several unusual artifacts, including a huge painting of George Washington.

One of the few places where you can explore a 1918 paddlewheel steamboat from stem to stern.

Dozens of striking Indian symbols cover the second-floor hallways of this rural courthouse.

This historic Ohio bridge is adorned with fanciful locks left behind by loving couples.

A surprising, but overlooked example of geology in the middle of the nation’s capital.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

This dramatic rail curve was once the target of a failed Nazi attack.

The first transatlantic wireless signal was received at this 17th-century fort.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

Rebuilt remains of a temple to Roman god Mithras.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

The highest lighthouse in Scotland shines from an abandoned island.

A magnificent, iconic stone tower in the Scottish Highlands.

Wander among the abandoned ruins of this once-powerful medieval town.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

This ancient Irish landscape boasts hundreds of legendary ruins.

An ancient neolithic tomb that only sees the sun twice a year.

The ancient tomb acts as a calendar that keeps perfect time.