You might not be able to tell by looking at it but this grouping of three buildings are some of the oldest in Oahu. The expertly maintained facility is the historic headquarters for Protestant missionaries, and today is a museum dedicated to explaining this important perspective that so greatly shaped modern Hawaiian life. Two of the buildings are constructed from coral blocks, while the third, a wooden framed building, happens to have been shipped from Boston, and is the oldest standing wooden building in Hawaii. There are tons of interesting exhibits inside here, but even exploring the grounds is a fun and informative way to go. Like most every acre of undeveloped Hawaiian land, the area around these historic buildings is full of lush tropical flora. For a historic and aesthetically pleasing look at one of the earliest influential forces in Hawaii, head on over to the Mission Houses Museum.