Frick Collection, 1 E 70th St (at 5th Ave), ☎ +1 212 288-0700, [2]. Tu-Sa 10AM-6PM, Su 11AM-5PM (reference library open M-F 10AM-5PM, Sa [Sep-May] 9:30AM-1PM). The former home of steel baron Henry Clay Frick, this sprawling mansion is filled with Frick's enormous personal art collection, displayed as he left it. It's worth a visit for the house alone, which is explained nicely in the audio tour. The collection is impressive, including works by Whistler, Corot, El Greco, Turner, Renoir, and Rembrandt. $18 adults, $12 seniors, $5 students, children under 10 prohibited. Pay what you wish on Su 11AM-1PM.