Locations, times and prices vary; visit historichousetrust.org for details. The Historic House Trust hosts its own festival, presented in conjunction with Open House New York (locations and times vary; visit historichousetrust.org for details; Fri 5–Sun 7). Many of its vintage sites will host period-specific events. You can also explore five different sites on the Manhattan Bike Tour (meet at the Dyckman Farmhouse Museum, 4881 Broadway at 204th St; Sun 7 11am–4:30pm; free, R.S.V.P. required), led by guides from Transportation Alternatives.