A remarkably well preserved tower dating all the way back to the Iron Age.

Largest lake in Great Britain measured by surface area.

A close look reveals that the Scottish monument is just slightly off-kilter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A majestic hotel for dreamers rises from the center of a fairytale wood.

A unique seaside cave where Aleister Crowley faked his own death.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This charming candle shop has been in business since 1789.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

A display of magnificent stained glass windows is the first exhibit of its kind.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

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

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.

An alchemist's “magic door” stands in the middle of a Roman park.

2300-year-old Roman road connecting the empire.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.