This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

The secret city built by the Manhattan Project.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

One man’s religious convictions led him to build this stone castle meant to withstand an apocalypse.

Mile-long cave system near Great Smoky Mountains.

This historic mansion was built as a symbol of love between a husband and wife.

The only recreation of William Shakespeare's indoor playhouse.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

Take an otherworldly journey in a school dedicated to out-of-body experiences.

One man's lifelong collection of 10,000 rare steins tells the story of beer drinking from 1350 to today.

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

A "hospital" where people went to be quarantined, die, and be buried in the yard.

An unfinished rail tunnel that has since been used to house cheese and bats.

America's post-nuclear-attack chambers of Congress.

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

Cherokee alphabet, proof of ancient North American Jews, or just a hoax?

A cult archaeology conspiracy theory claims these West Virginia petroglyphs were written by Irish monks in Ogham.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Step back in time on this preserved 1800s farm.

This vast kitty-themed collection illustrates the history of human-cat interaction.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.