The easiest way to get there is by rental car so you can arrive early to beat the crowds. There is a parking fee of €30 per car. Otherwise it is very easy to reach on public transport from Cortina, Toblach/Dobbiaco and Misurina.
Colisée
Le Colisée est facilement accessible en transports en commun ou à pied depuis n'importe quel endroit du centre de Rome.