A towering cemetery monument honors a man who threatened to expose the Freemasons and paid with his life.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Dr Barnes' $25 billion private collection of art and arboretum.

In the early 1800s, surgery was also a show.

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

This elaborate towering structure was once famed for its revolutionary height.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

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

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

New York City's smallest piece of private property.

Willy Wonka would love this weird half-a-home.

This centuries-old tree tells an unusual tale of vegetation and fertility in the desert.