This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

The world's largest collection of the world's largest objects is in one small Illinois town.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

Exact replica of the ancient monument, but much, much lighter.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

At this former Prohibition speakeasy, electric birds signaled the arrival of hooch.

A relic of FDR's brief foray into utopian urban planning.

This colorful gate stands as an entrance to the walled city of Old San Juan.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

This museum explores the grim reality of life in the earliest British colonies in America.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

A diorama of the Civil War, fought by cats.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

Home of the only civilian casualty at the Battle of Gettysburg.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The blinking light atop the iconic landmark has been sending secret messages for decades.

This former asylum for Black Americans is haunted by its history of violence and racism.

The only public school for Black children in the region from 1895-1936.

The oldest military monument in the United States.