Reservations required. Rockefeller Center — New York’s urbane urban wonderland — is full of surprising history, remarkable art and stunning architecture. Conceived as a new home for the Metropolitan Opera, but built instead as Radio City, Rockefeller Center is a private real estate venture that has evolved into the public square of Midtown Manhattan.

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.