Metropolitan Bakery.

My wife is a connoisseur of almond croissants. She purchases one at every new bakery and coffee shop we visit. One of her all-time favorites is from the Metropolitan Bakery in Philadelphia. They are made fresh every day and on Saturday morning if you don't get there early enough you won't get one. They do take reservations, though. Put your name on the list and they will save one for you. They are big, American style croissants, flaky, buttery but not oily, with just the proper proportion of almond taste. They are a little pricey, but they are worth the cost.

http://www.metropolitanbakery.com/