A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

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

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

A century-old tradition has culminated in a small but singular collection of feline effigies.

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

One part local history, 99 parts gruesome haunted house.

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

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

The walls of the iconic dome are hollow and have a secret stairway.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Fantastic stories on a miniature railroad.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Baroque celebration of the end of the Great Plague of Vienna.

The Habsburgs' royal collections of art and wonders.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Erotic art covers the walls of the largest ancient pleasure palace.