A painfully obvious spy house sits right across the street from the Russian Embassy.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Cryptic messages embedded in the New York City sidewalk.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

World's first "penitentiary," meant to be humane, drove men insane.

A toxic ghost town sitting atop a massive coal fire.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

One of the world's largest model railroads is a mind-boggling achievement.

Where the embers of the Big Bang were first detected.

Eighteen miniature death-scene dioramas.

Meet some of the most prominent figures in Black history through life-sized wax models.

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

A museum dedicated to exhibiting remarkable outsider art.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

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

The South Carolina competition challenges you to trap as much grits on your body as possible.

A stockpile of childhood lunch pails turned collectibles.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

One of the most acclaimed eateries in Arkansas is a two-table diner on the ground floor of a family home.

Dothan, Alabama has been invaded by scores of anthropomorphic peanuts.