The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

The oldest residential street in Europe also features an optical illusion.

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

The last resting place of the famous Native American princess is marked by a haunting monument.

A holy well supposedly infused with a saint's spirit flows within this quaint chapel.

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

One of the American Southwest's most extensive collections of Navajo rock art.

An eclectic assortment of medieval architecture in a small Iowa town.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

The black lab that was voted mayor of a California town is forever remembered by a life-size statue.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

For over 100 years, this Indiana town has had a tree growing out the top of the local courthouse.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

The oldest inn in England served brew to the crusaders.

This 15th century pub is one of only two pubs in England situated on consecrated ground.

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

The last of the 19th-century booze-free bars has been slinging teetotal tonics for over a century.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

Hidden in the hills is a mysterious stone structure, known only to a few.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The ancient tomb acts as a calendar that keeps perfect time.