The crown jewel of Riverside is the Mission Inn, a Spanish-Revival hotel whose elaborate turrets, clock tower, mission bells, and flying buttresses rise above downtown. Docents of the Mission Inn Foundation, whose museum contains displays depicting the building's illustrious history, lead guided tours. Taking his cues from the Spanish missions in San Gabriel and Carmel, architect Arthur B. Benton designed the initial wing, which opened in 1903. Locals G. Stanley Wilson and Peter Weber are credited with the grand fourth section, the Rotunda Wing, completed in 1931. You can climb to the top of its five-story spiral stairway, or linger in the Courtyard of the Birds, where a tinkling fountain and shady trees invite meditation. You can also peek inside the St. Francis Chapel, where celebrities such as Bette Davis, Humphrey Bogart, and Richard and Pat Nixon tied the knot before the Mexican cedar altar. Eight U.S. presidents have patronized the Presidential Lounge, a bright, wood-panel bar.