Examine the white oak timbers (the bones) of Lefferts Historic House and the many layers that were added, subtracted and changed over the past 230 years. Climb the staircase for a view of the attic's smokehouse and descend into the cellar for a look at the foundation. For adults and teenagers. Only 10 people per tour. Reservations required: call (718)789-2822 ex. 304.