built adjacent to the John Deere Commons in the 1990s in downtown Moline. John Deere World Headquarters, designed by Eero Saarinen and completed in 1963 in Moline. The John Looney Mansion, designed and built in 1897 for the attorney, publisher and gangster John Looney in Rock Island which still stands off 20th Street and 17th Avenue. Lock and Dam No. 15, a 1,200-foot roller dam with twin locks across the Mississippi River between Arsenal Island and Davenport. The roller dam, billed as the longest of its type, maintains a pool upstream that allows river traffic to pass through the once notorious Rock Island Rapids. Mississippi Valley Fairgrounds, a fair and exposition venue in Davenport Modern Woodmen Park, formerly John O'Donnell Stadium, home of the Kansas City Royals' class high A affiliate, the Quad Cities River Bandits, on the Davenport riverfront. With the lights of Rock Island across the Mississippi and the Centennial Bridge looming just beyond the right-field fence, the park was named by USA Today as one of 10 great places for a baseball pilgrimage. The ball park added a 110 ft. ferris wheel before the start of the 2014 season. Old Main, completed in 1888, the oldest building on the campus of Augustana College. Located on a bluff overlooking the Mississippi River, its iconic and newly renovated dome was lighted as of October 2011. Putnam Museum in Davenport Quad City Botanical Center in Rock Island Quad Cities Waterfront Convention Center, located in Bettendorf RiverCenter/Adler Theatre, a convention and performing-arts complex in Davenport. The 2,400-seat Adler is the former RKO Orpheum Theater, which opened in 1931, designed by A.S. Graven of Chicago, whose projects included the Drake Hotel in Chicago and the Paramount Theater in New York City. The theater was extensively renovated and expanded in 1984–86 and 2005. River Music Experience, a performance, education and music-history venue in the Redstone Building, the former Petersen Harned Von Maur department store Rock Island Arsenal, manufacturer of military equipment and ordnance since the 1880s, now the largest government-owned weapons manufacturing arsenal in the United States. The arsenal is located on Arsenal Island (formerly known as Rock Island) in the Mississippi River between Davenport, Iowa, and Rock Island, Illinois. Fort Armstrong was built there in 1816. During the civil war, the island held a Union prison camp for Confederate soldiers. The Federal-style home of Colonel George Davenport, built in 1833–34, the oldest