A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

This mundane post marks the old location of the city's main postal hub.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

This ancient Hawaiian henge may have been an early star chart.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Race through the maze, get your name on the sign.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

A sweet symbol marks the place where torturous executions were once carried out.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

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

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

"Try not to knock anything over!"

The record holder for the world’s largest peach.

Even Henry David Thoreau found this glacial pothole irresistible.

According to the experts at the Guinness World's Record office, this is the longest candy counter in the world.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.