When the Mackenzie River is ice-free, Northern Transportation Company Limited provides a commercial barge service from Hay River, on Great Slave Lake to the regional terminal in Inuvik. The annual sealift moves supplies as far east as Taloyoak, Nunavut and west to Utqiagvik, Alaska. A distinct feature of Inuvik is the use of "utilidors" – above-ground utility conduits carrying water and sewage – which are covered by corrugated steel. They run throughout town connecting most buildings, and as a result there are many small bridges and underpasses. The utilidors are necessary because of the permafrost underlying the town. Another feature is an "Inuksuk" placed outside the Mackenzie Hotel, which was rebuilt in 2006. Inuvik has a subarctic climate (Köppen "Dfc"). Summers are typically wetter and cool, with temperatures varying wildly throughout the months due to its peculiar location near the cold Arctic Ocean. The average hottest month of the year, July, has a mean high of and mean low of . Unlike many other North American continental climates, Inuvik warms up very quickly during the months of May and June due to the rapidly increasing day length, and that remaining snow cools down until May. June is a warmer month than August. Seasonal transitions are extremely short, with mean daily temperatures rising or falling as fast as per day. Winters are long and extremely frigid; the coldest month of the year, January, having a mean high of and a mean low of . Freezing temperatures can occur any month of the year. Inuvik has a great variation of temperatures during the year, usually peaking below in the winter and above in the summer. The highest temperature ever recorded in Inuvik was on 17 June 1999 and 20 July 2001. The coldest temperature ever recorded was on 4 February 1968. Snow that falls from October onward usually stays until the spring thaw in mid-May. By March, the median snow depth has reached its greatest, about . Inuvik's Our Lady of Victory Church, often called "Igloo Church", is a famous landmark in the region. It is the most-photographed building in the town . Inuvik has North America's northernmost mosque, which opened in November 2010 after being built in Winnipeg and moved by truck and barge. Some media reports have mistakenly called the mosque "the world's northernmost mosque", but in fact mosques in Norilsk, Russia, and Tromsø, Norway, are both slightly farther north than Inuvik.