A spooky defunct railroad tunnel now part of a sprawling trail.

A riverside park built around the ruins of a massive dam that collapsed in 1909.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

When waves crash onto this section of beach, the rocks sing a song.

This large midwestern cavern features impressive rock formations and an underground waterfall.

An idle pastime becomes a record holder in Boys Town, Nebraska.

America's smallest town is run by its single citizen/mayor/librarian/bartender.

A fascinating collection of art made from petrified wood and fossils by two octogenarian twin brothers.

A self-built castle made by a mysterious man.

The house's confection-like decorations are the result of one man's painstaking work over decades.

More than 21,000 images fill this overlooked gem of a prehistoric site.

An ADA-accessible trail and deck offering stunning views of Colorado’s Mount of the Holy Cross.

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

This interpretive path lets you get up close and personal with dinosaur bones.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

When ecosystems collide in the arid Southwest.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

A bar, burger joint, and arcade housed in a late 19th-century church building.

Launch vegetables using oversized slingshots at this Fingerlakes winery's roadside attraction.

This Buffalo museum hides an Art Deco gas station designed by Frank Lloyd Wright.

A CT scan revealed the identity of this 3,000-year-old mummy that everyone erroneously thought was female.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.