A map-style site with a strong identity. The mini-map is really responsive; a refreshing way of navigating that doesn't distract too much from the content. Each 'zone' has its own slider of extra content, with a satisfying reveal.
Andrew Gooch's portfolio site is a brilliant example of how attention to detail can make a very simple interface enthralling. The project location indicator provides context and supplements the browser's scrolling mechanism brilliantly.