Dig for your own trilobites in this goldmine of invertebrates.

A house carved into a rock in the 1940s.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

An enormous image of Utah's salt flats made entirely from tape.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

Pyramid home to an obscure religious group that practices modern mummification.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

This jail which was in service for over a century is now open for curious visitors.

The first of Lancaster's "rural cemeteries."

The oldest farmer's market in America is so ancient it was approved by the King of England.

This recreation of a 19th-century dime museum is full of oddities.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A legendary boxing venue and ring featured in Rocky V.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

This beloved marketplace mascot poops money and grants good luck.

The abandoned coal loading dock is a canvas for unsanctioned art.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

The humble field where the first Major League Baseball game was played.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

A daily replay of the experiment that proved the rotation of the Earth.