Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

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

Used as an example in one of the first dictionary entries for "museum" in 1706.

Famously misunderstood wonder of the ancient world

Exact replica of the ancient monument, but much, much lighter.

Home to items never before seen by the public.

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

It was once the base for a series of domestic terror attacks.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.