Host a private walking tour for up to 20 family members, friends or colleagues, given by one of MAS's outstanding architectural tour guides (value $375).  Perfect for a family reunion or office outing, tours can be chosen from over 20 fascinating locations, such as Gansevoort Market, The Past and Future of the World Trade Center Site, TriBeCa, Grand Central Terminal, Downtown: Skyscrapers, and More.  You will also receive a Sustaining Membership ($125) with MAS and a copy of the Municipal Art's Society's 10 Architectural Walking Tours of Manhattan , by Francis Morrone and Matthew Postal ($29.95 value).  Check www.mas.org for more details.