York Factory National Historic Site of Canada features remains of the great Hudson's Bay Company fur trade post, including a depot built in 1832, the oldest wooden structure still standing on permafrost. Across Sloop Creek are the ruins of a stone gunpowder magazine and a cemetery with markers dating back to the 1700s. Access is limited to charter planes or by canoe down the Hayes River. Weather conditions are unpredictable at York Factory NHS and can force a longer than anticipated stay. York Factory NHS is situated in polar bear country, and visitors should be aware of the possibilities of an encounter with a bear. Camping is now allowed at York Factory NHS. Visitors must contact the Parks Canada office for accommodations and safety information. Guided interpretive tours are available in summer. Fee for guided tour.