With the entrance of the railroad in the 19th century, tourists discovered the town and its cool, clean mountain air. They sought relief from the heat, humidity and pollution of coal-era summers in Boston, Hartford, New York and Philadelphia. Several inns and hotels were built to accommodate their increasing numbers. On a hilltop facing the Presidential Range is the grandest, The Mountain View House (now called the Mountain View Grand Resort & Spa), established in 1866. The historic hotel underwent an extensive renovation in the 2000s, and is now one of the most luxurious in New Hampshire.