The burial grounds of a secret society includes fences topped with fake Tesla balls.

Historical figures from New York City's Catholic community reside in Midtown.

Where a great scandal unfolded with a famous female revivalist at its center.

A simple plaque remembers an act of WWI terrorism that obliterated an island and forever scarred the Statue of Liberty.

The largest historic preservation organization in the United States.

An auroral research program that superheats the ionosphere.

Final resting place for the Triangle Shirtwaist fire’s unidentified victims.

The monument dedicated to Phineas Gage in the town where his accident happened.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

1887 era Russian Orthodox church in Minneapolis.

A tiny islet just off Long Island offers a wealth of infectious curiosities.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

Local history museum with mammoth bones and an old myth about local giants

The highest point in Oklahoma used to be a lawless outlaw's paradise.

A heartbreaking monument showing the last morning in the life of Jane Griffith.

An ancient cemetery with some historic bodies underfoot.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

A preserved stretch of ancient fossilized trees with an impressive gem collection to boot.

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

A building shaped like the Army Corps of Engineers logo, because why not?

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

The world's largest set of the ten commandments lay nestled in the heart of the Great Smoky Mountains.

The first permanent memorial to a unique secret weapon of World War II.

Where Eunice Williams was murdered by natives, and where locals say her ghost still haunts.