"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

A tiny one-room church built after one man's prayer for healing was answered.

The site of America's first commercial oil well essentially disappeared after the town went bust.

For decades, it has disappeared and reappeared as water levels rise and fall.

The world's longest known cave system.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

See the place where little league baseball was born.

Tour the row, actually a few blocks, where 19th century lumber barons built their grand homes.

Experience the pivotal Civil War battle at this interactive museum.

This Civil War monument was designed by an eccentric architect and Gettysburg veteran.

While seemingly a cruel joke, this bench actually honors an esteemed member of the community who passed away in 2006.

This is the spot where the bloodiest battle in the American Civil War may have started.

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

This covered bridge was used by both Union and Confederate troops during the Battle of Gettysburg in 1863.

Home of the only civilian casualty at the Battle of Gettysburg.

A diorama of the Civil War, fought by cats.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

This outdoor exhibit features a historic wooden dam once used to help boats navigate the Ohio River.

A memorial honoring those who perished in one of the worst construction disasters in U.S. history.

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