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

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

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

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

Did Inca children also slide down these smooth rocky slopes above Cusco?

This monster fiberglass crustacean stands watch over the self-proclaimed "lobster capital of the world."

This massive solar system model is sprawled out across Maine's suburban wilderness.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Few other hotels can rival the grandeur of the Castle in the Rockies.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The large collection of pre-Columbian pottery might make you blush.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

This giant geoglyph of mysterious origins is now the site of neo-pagan rituals.

A museum founded to reflect on and remember the human rights abuses under Chilean dictator Augusto Pinochet.

This plaza at the end of the world teems with monumental tributes to a problematic history, and laser discs.

A natural history wunderkammer in the middle of the desert.

This massive chalk hill carving is one of England's most beloved giant horse geoglyphs.