This is an incredible 1904 Arts and Crafts style mansion perched on the edge of the water. It used to be the estate of a shipbuilder and former Seattle mayor. Sadly the interior is closed but if you're exploring around Moran State Park, it's worth taking the extra 10 minutes just to see the exterior and walk the grounds.
If you're spending the night in Anacortes before catching the ferry to the Island, we highly recommend taking this 20 minute detour to check out Deception Pass Bridge! The bridge was built in 1935 and connects Whidbey and Fidalgo Islands. Check out Rosario Beach for a cool view of the bridge from a bluff down below (this location is also where Chelsea does a ton of photoshoots)! One of our favorite spots in Washington.