The sign at the garden gate reads: "These Plants Can Kill."

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

The summer home of the largest colony of bats in the world.

Amazingly detailed marble cinerary urns that once held the cremains of Roman elite.

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Hike the ruins of a zoo that was shut down by an unsolved murder.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

A collection of haunted objects and macabre oddities under one roof.

A registered historic landmark shrouded in unsettling local legends.

This octagonal rotary jail built in 1889 now serves as a visitor's center.

Pompeii's less famous neighbor is still revealing her secrets.

The oldest volcanology research center in the world.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An astounding collection of medical specimens, including bits of President Lincoln.

Originally brought to Texas by Czech settlers, these sweet and savory pastries are an essential local breakfast staple.

More than five miles of underground passageways.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.