Go inside to really appreciate this 500-year-old technological masterpiece.

The only museum with its curator—and her pets—buried inside.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

A Nesting Doll of Churches.

2300-year-old Roman road connecting the empire.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Architectureal fantasy quarter of Rome.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

A 16th-century horror show built in a lovely Italian garden.

Water and windows define this defensive Italian well.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This frequently-photographed waterfall takes only a short hike to visit.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

100-year-old shipwreck you can walk up to at low tide.

A massive sea stack famous for its appearance in The Goonies.

Two massive rock outcroppings on the Oregon coastline.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

This charmingly homemade amusement park has been growing for 40 years.

Hollowed out cedar log tubs set in an ancient towering forest.