How do you keep the city less smoky? Use them bikes! I took this just before we got to Église Saint-Eustache, a church in Paris’ 1st arrondissement known also for the big head sculpture in front of it. Just like Vienna, bicycles for hire is a great option for tourists to view the city. I wasn’t able to check how much they cost in Paris but in Vienna it’s as cheap as 5€ for 6 hours – that’s free for the first hour and 1€ each for the succeeding hours.