These charming wooden row houses, lining both sides of narrow Sylvan Terrace, were built around 1882 on what was then a private street carved out of the estate surrounding the Morris-Jumel Mansion. Today, with its identically painted facades and Belgian block pavement, Sylvan Terrace feels like a place out of time, especially when you're looking in the other direction toward the mansion. Check it out for yourself in Street View.
UPDATE: You can see photos and floor plans of the interiors of a couple of these houses here and here.
Looks curiously Philadelphian.