Gay Wedding Event Location in Port Severen, ON, Canada. Christie’s Mill Inn and Spa is located in Southwest Muskoka close to Georgian Bay on the Port Severn Waterway. Spectacular views, surrounded by nature and relaxing atmosphere, Christie’s Mill captures what Muskoka is all about. Our waterfront upscale Inn has 42 rooms, banquet facilities, full service spa, dining room and indoor pool. Christie’s Mill Inn and Spa is conveniently located 1.5 hours north of Toronto only 1 km off Hwy 400.