There are lots of museums in Washington, D.C., but not all of them get the attention they deserve. With over 17 museums in the nation's capital, there are a couple of really unique options when you are looking for a few museums to tour. Here is our list of unique lesser-known museums in Washington, D.C. more The Mansion on O Street The Mansion on O Street is one of our best picks for a unique museum in Washington, D.C. This eclectic museum has secret doors, themed rooms, and various types of diverse artwork. There is plenty to do and look at when you stop at the Mansion on O Street. This museum is designed for promoting and embracing life, art, and creativity. The International Spy Museum Get ready for a fascinating museum. The International Spy Museum is a non-profit organization that teaches the public about the world of intelligence and espionage. This museum has tons of interactive exhibits and lots of high tech spy gadgets. Get lost in the history of how spy work has influenced our past and explore how it will continue to shape our future. The Heurich House Museum Known as the Brewmaster's Castle, this museum is in historic DuPont Circle. It's goal is to preserve the legacy of Christian Heurich, a German-American immigrant who had the largest brewery in Washington, D.C. The mansion was built for him in 1894 and has been retained for its Romanesque residential architecture and impressive interior. The mansion was built with some of the most technologically advanced equipment of the time, with metal speaking tubes, electric lighting, burglar alarms, and even fireproofing. The museum keeps this building preserved and hosts a variety of beer-inspired events throughout the year, including an on-site homebrew class. Old Stone House The Old Stone House was built in 1766 in the British colony of Maryland. This building is preserved for its architecture. Originally it was protected as a location that was significant in the life of George Washington. It was believed to be Suter's Tavern, a place George Washington once stayed. The Old Stone House was actually the location of a clock shop owned by the son of the tavern owner. Over time, the history of the two buildings had become mixed up. The museum is open daily to the public and offers excellent insight into the architecture and design of the 1700s. The Culture House This museum is another contemporary art project, located inside an early 1900s Victorian church. The building itself serves as a work of art, as the entire exterior of the church has been painted as a mural. You can find lots of dynamic art and large-scale paintings inside the Culture House. So if you're heading to Washington, D.C., head over to one of these museums while you're there. There are plenty of exciting things to see and learn while exploring our nation's capital, so take some time to check out some of the more unique museums. You are sure to have a good time in the process. image via pixabay