This is a beautifully detailed, laser engraved and precision cut topographical Map of Big Spirit Lake in Iowa including West Okoboji and East Okoboji with the following interesting stats carved into it: Big Spirit Lake is the largest natural lake in Iowa; Max depth 24 feet; Avg depth 17 feet; 5377 surface acres; 15 miles of shoreline. These lakes are glacial potholes, remnants of the most recent ice age approximately 13,000 years ago. All maps include special points of interest laser engraved into the map face and come with a beautiful blue self-adhesive Swarovski Crystal to mark your preferred location on the map. Each map is a beautiful artistic handcrafted work of art using the finest woods with special attention to every detail. Due to the natural variation in wood grain, each map will vary slightly in finish and color. Made in America