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New York is a walker's town. But sometimes we're so busy striding (OK, teetering) along in our heels that we forget to actually notice our surroundings.

Enter the Domus Architecture Guides, a new iPhone app ($5) that introduces you to the city's most interesting buildings, and makes for a great companion on your next Sunday stroll.

The guide features 80 architectural landmarks across Manhattan, with historical information and fascinating design notes on each one. Think big-name structures like the Chrysler Building and Hearst Tower, but also secret residential gems, modern retail spaces and quirky, little buildings you've always wondered about, whose stories you never knew.

On our recent test-drive, we picked up some pretty impressive facts--for instance, the gorgeous, 42nd Street Grace Building was a flagrant challenge to 1970s zoning codes, and Frank Gehry's IAC Building was designed to be viewed from a moving vehicle, along the West Side Highway.

While you can choose from a number of built-in tours, we like to simply search for nearby buildings--the app finds your location and sorts accordingly--and plan our route from there.

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