The Upper East Side – Manhattan’s gold coast – maintains an aura of conservative respectability, and perhaps as a result never attracted as much Art Deco flash as its counterpart on the west side of Central Park. Nevertheless, tucked among the Beaux-Arts town houses and sedate neo-Georgian apartment buildings, the neighborhood has some remarkable examples by some of the city’s best architects of the period.

Reservations required. Tour of the Woolworth Building lobby, closed to the public for more than a decade and now open again. The tour includes a detailed look at the building’s unmatched polychromatic terra-cotta exterior, and an in-depth exploration of the lobby and its wealth of ornament, including hidden corners and staircases — plus a special visit to the mezzanine level for an up-close view of its extraordinary mosaic ceiling.