Helena, Montana 1869, October 1871, August 1872 and January 1874 that swept through the early mining camp. On August 2, 2016 an arson attack severely damaged the "tower" and was deemed structurally unstable. The tower is to be "demolished"; however, it is to be ""rebuilt" using the same methods that were used in its original construction. In 1889, railroad magnate Charles Arthur Broadwater opened his Hotel Broadwater and Natatorium west of Helena. The Natatorium was home to the world's first indoor swimming pool. Damaged in the earthquake of 1935, it was closed in 1941. The many buildings on the property were demolished
Indiana University Natatorium six underwater windows for television and coaching analysis. There are approximately of water in the main pool. There have been 101 American records and 15 world records set in the pool to date. The diving well of the Natatorium has hosted many local and national diving events, including the 2008 Olympic trials. The diving well has a depth of over and holds more than of water. It has four 1-meter and four 3-meter boards as well as five diving platforms of 1, 3, 5, 7.5 and 10 meters in height. The pool is kept at approximately . There are also