London

Visit London -- London's Official Website

Kids Love London -- Things to do for Kids

London Toolkit -- What to see and do in London, England

New York City, New York

This is New York City -- New York City's Official Website

New York City Travel -- From About.com

How New York City Works -- From HowStuffWorks.com

Insider's New York City -- From National Geographic Traveler

Los Angeles, California

Discover Los Angeles -- Los Angeles' Official Website 

How Los Angeles Works -- From HowStuffWorks.com

Insider's Los Angeles -- From National Geographic Traveler

Chicago, Illinois

Choose Chicago -- Official Chicago Travel Website

Chicago Office of Tourism

How Chicago Works -- From HowStuffWorks.com

Miami, Florida

City of Miami -- Visitor's Guide

Visit Miami -- Official Guide from the State of Florida

How Miami Works -- From HowStuffWorks.com

Insider's Miami -- From National Geographic Traveler

Milwaukee, Wisconsin

Visit Milwaukee -- Official Guide

48 Hours in Milwaukee -- From National Geographic Traveler

Houston, Texas

Visit Houston -- Official Guide from the Greater Houston Visitors Bureau

How Houston Works -- From HowStuffWorks.com

48 Hours in Houston -- From National Geographic Traveler