My favorite restaurant in the country may just be Peter Luger's Steak House in Brooklyn. I used to say it was a place that made you never want to eat steak anywhere else but a few other eateries have since popped up (like the small but growing Wolfgang's Steak House chain) and provided close alternatives.
Still, there's something very special about Peter Luger's. Here, from the New York Times site, is a 360° tour of the Peter Luger steak vault. This is one of those links that may require registration. (And hey, if it bugs you to have to register for a website and you fear them sending you unwanted e-mail, get yourself a GMail account and just use it for sign-ups.)
Oh…and while you're over there, read the related article.