This 38-room estate was completed in 1929. The original owner, Lora Knight, had this precise copy of a 1,200-year-old Viking castle built out of materials native to the area. She furnished it with Scandinavian antiques and hired artisans to build period reproductions. The sod roof sprouts wildflowers each spring. There are picnic tables nearby and a gray-sand beach for strolling. A steep 1-mile-long trail from the Emerald Bay lookout leads down to Vikingsholm, and the
hike back up is hard (especially if you're not yet acclimated to the elevation), although there are benches and stone culverts to rest on. At the 150-foot peak of Fannette Island are the ruins of a stone structure known as the Tea House, built in 1928 so that Knight's guests could have a place to enjoy afternoon refreshments after a motorboat ride. The island is off-limits from February through mid-June to protect nesting Canada geese. The rest of the year it's open for day use.