A good spy is light on his feet, quickly blends in with his surroundings, and is usually the butler. Learn how skillful spies operate with today's Groupon: for $10, you get one general-admission ticket to the International Spy Museum (up to a $21.15 value).

Considered to be the country's only public museum devoted to the history of global espionage, the International Spy Museum teems with multimedia displays, hands-on activities, and educational events. Equipped with general-admission tickets, visitors can stroll through the museum's eclectic exhibits, which include presentations of Civil War spy memorabilia, modern-day cyber surveillance tools, one of the largest international collection of spy related artifacts on public display, and James Bond's first cell-phone bill. At an interactive audio-visual exhibit, emissaries-in-training create their own secret identity and learn how to maintain its mystique without using a Groucho Marx mustache-and-glasses disguise. Replicas of Cold War–era Berlin enlighten guests on that period's prevalent spy culture, and an extensive array of gadgetry offers a glimpse into the life of actual secret agents.

Though not included with general admission, numerous immersive experiences such as Operation Spy and Spy in the City put patrons' spy skills to the test, while a full calendar of events includes Spycast, a series of interviews with ex-spies, intelligence experts, and sentient magnifying glasses.