At last week's telescope driver training I found out that Melbourne contains a 1 to 1 billion scale model of the solar system. It's an artwork by Cameron Robbins and Christopher Lansell.
The Sun is located at St Kilda marina and the planets are spaced out along the beach and foreshore back towards the city.
Since the weather was lovely today, I thought ... why not? The guide says you can walk from the Sun to Pluto in about an hour and a half, which would make your speed approximately three times the speed of light, or warp 1.44, if you like.