World's first "penitentiary," meant to be humane, drove men insane.

Mysterious rocks that ring musically when struck.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

The large fjord lake is thought to be the home of "Ogopogo," a giant sea serpent.

The only thing stranger than stumbling onto these philosophical musings is the story of the homesteader who created them.

This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

With over 340,000 artifacts and counting, there is something for everyone, often called the "Smithsonian of the West."

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

A roadside park in eastern Maine first marked the halfway point between the equator and North Pole with a brass pin in 1896.

A desert settlement founded and later abandoned by Hawaiian members of the Church of Jesus Christ of Latter-day Saints in Utah's Skull Valley.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

This cavernous abandoned marble mine is popular with ice skaters in the winter.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

How would you like to dine in the same room where some of the Titanic's victims were embalmed?

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

The "Rocky Horror Picture Show" character has a hidden camera that broadcasts people doing the "Time Warp."

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

The highest point in Texas is capped by a big silver pyramid.

The Grand Canyon of Texas.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

The wreckage of a crash that killed nine people still litters the Franklin Mountains.

The remains of a historic ranch house that witnessed the Civil War battle dubbed the “Gettysburg of the West.”