Built in 1905 and in the image of the U.S. Capitol, the Idaho Capitol is the only statehouse in the country that is heated by geothermal water. The building was completed in 1920 and features a rotunda floor in a marble pattern called the Compass Rose. The grounds are well kept and have several notable trees, some of which were planted by U.S. Presidents. The building is surrounded by the Capitol Mall, which includes many older public buildings and monuments. Tours are available upon request. Visiting hours vary, check website for more information.