The homestead of American patriot John Adams.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

A semi-scholarly approach to sex.

The prototype for all Nazi concentration camps.

The home of aviation trailblazers, in a remote corner of the big city.

Home to the Titanic Historical Society's collection.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

This sprawling museum holds one man's giant collection of real tanks.

A dilapidated dock tells the story of Titanic's missed arrival.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

World War II-era Nazi compound nestled in the Santa Monica hills.

Resonating tubes make music from highway overpass.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Try not to get slimed in Tribeca.

The famous author's cottage hideaway.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A giant donut stands as a popular symbol of Los Angeles iconography.

A collection of full-size movie monsters opened to the public.

The legend of a local monster still haunts this small town.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.