On a rooftop above Flinders Lane, in the middle of Melbourne, a row of restored vintage Airstream caravans has been fitted out as guest rooms, an unusual answer to the city-hotel format. Each polished trailer is self-contained, and the rooftop it shares doubles as a bar that has drawn attention in the local press. The location is about as central as Melbourne gets, with the laneways, galleries and dining of the CBD at street level below. It is a small operation trading on the design and novelty of the Airstreams rather than room count, and suits travellers who want a night that is memorable in itself as much as a base for the city.