MOHAI is now located at Lake Union Park! The beautifully restored new facility offers 50,000 square feet of exhibit space. Come explore and enjoy this exciting new space at the beautifully restored Naval Reserve Building at Lake Union Park. MOHAI has grown to become the largest private heritage organization in the State of Washington, by collecting, preserving, and presenting the rich history of the Pacific Northwest. MOHAI attracts more than 60,000 visitors annually from the area and beyond, including thousands of school children. Its engaging exhibits and programs, collection of nearly 4 million historic artifacts, archives and photographs, and its award-winning educational programs have created a truly unique appreciation for the Northwest's diverse cultural, social and economic history.