You should come to Melbourne. There's a 5.9km walk along the foreshore that includes the sun and all the planets (including Pluto, as it was created before his demotion) cast to scale and placed on plinths in the appropriate location. They also include Proxima Centauri, except that you have to travel around the planet pole-to-pole to match the scale distance.
This is the sun:
This is the Earth and its moon:
More photos and information here
And this map gives you an idea of the distances involved: