This site is both a remarkable reminder of the town's mining history and a fantastic government blooper.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Spend the night in this formerly abandoned traditional Scottish village.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

This stone incorrectly marks the 35th parallel, causing some territorial kerfuffles.

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

In the hometown of the Grand Ole Opry star is a larger-than-life memorial statue made entirely from chicken wire.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

The first full-scale tunnel built in America is short but scenic.

Live long and prosper in Tennessee.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

More than five miles of underground passageways.

Railroad came. People came. Railroad left. Town died.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

All that's left of the quintessential "cabin in the woods."

Home of an evil witch famous within southern folklore.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Enormous lake at the bottom of a unique cave system.

This amazing 15th-century mural remained hidden in plain sight for centuries.

The easternmost town in Alaska can only be accessed from Canada.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.