A former waterfront market is now in the center of town due to some interesting Boston engineering.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

At 207 feet, one of the world's longest continuous escalators.

A grove of colossal man-made flowers built to collect the sun's rays.

One part antique store, one part curiosities hodge-podge.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Macabre astrological automaton clock dating to the late 1400s.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

The prototype for all Nazi concentration camps.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

King Ludwig I's collection of beautiful women.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The celebrated eyesore created by starry-eyed sweethearts.

A vast Communist-era exhibition space in the Bulgarian capital.

A striking symbol of the Bulgarian capital.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

Charles Babbage's proto-computer, painstakingly brought to life.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

An unusual round church in London with a Templar past.