Decopix - The Art Deco Architecture Site, photo site
Art Deco Society of New York

Howe's 20th Century Skyscraper archives
Building The Chrysler Building: The Social Construction of the Skyscraper
Nalyd's Skyscraper Page & Links
Netten's site, The High-Rise Pages, on tall structures
(Claims to be the "longest existing skyscraper website on the Internet; online since october 6, 1997" -- hum, this one's been continuously online since July 1996 and there must be others... Well, never mind.)
Gramsbergen's The World's Best Skylines
W.A. Zdaniewski's Photo Gallery

NY Times' New York's Tallest, skyscraper height comparison (published 2002)
The City Review, articles on urban issues
Cityrealty real estate and apartment directory
A Love of Monsters: Gargoyles & Architectural Details in NYC
Forgotten NY, scenes of "off-beaten-track" NYC
Empire State Building official site
Building The Chrysler Building: The Social Construction of the Skyscraper
NYC skyline pictures
NYCtourist's PhotoTours

Chicago Imagebase
Chicago Architecture Foundation
Van Der Rohe's Mies van der Rohe Society: Lake Shore Drive Apts

Nycroads.com, New York Area Roads, Crossings and Exits
Dave Frieder photography, NY bridge photos

Boston College: Architecture Web Sites
The Great Buildings Collection Online
Yahoo! Architectural Directory
Sullivan's Digital Imaging Project
SPIRO, Architecture Image Library