A short tunnel built straight through a magmatic dike.

This century-plus-old baseball park has hosted some of baseball's royalty and stands as the oldest sports complex in Jacksonville.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Meet Rita the Rock Planter, one of Danish sculptor Thomas Dambo's enormous wooden trolls.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

The remains of one of Wales’ great medieval buildings, with a pub in the cellar.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

Designed to allow funerals to proceed over the River Dulnain.

Legend has it that this stone moves down to the river sometimes to have a drink.

Colorado's only active volcano last erupted around 4,000 years ago.

A glimpse into the state's vibrant literary culture along with inspiring stories from an inclusive author community.

The seaside ruins of an ancient salt production facility.

Wally is the 26-foot-long fiberglass emissary for Garrison, North Dakota, one of the self-proclaimed (and hotly contested) Walleye Capitals of the World.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

This 17th-century Portuguese fort now houses a nautical museum.

This tall stone wall with no door and ill-matched windows was built centuries ago, and used as a shelter for domesticated pigeons.

Although not officially the world's tallest bin, this giant trash receptacle was designed to stop littering.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

In addition to escorting prospective couples to and from ballrooms, this lane was also a place for gentlemen to settle scores.

An underground wonderland in Iowa.

This rocky outcrop served as a quarry for some of the bluestones that sit at the center of Stonehenge.

This huge coastal nature reserve in Wales was a stand-in for the Arabian Peninsula in 'Lawrence of Arabia.'