After crossing through the tunel, the Canal opens to the Arsenal marina. This port is the only real marina in Paris. It can accomodate more than 200 boats. A nice sidewalk goes all along the marina with the Bastille in the background. At the end of the port, we have found a strange "shantytown" boat. It seems to fluctuate correctly! The Canal continues its route under the Bastille, reappearing at the end of the Boulevard Richard Lenoir. This was done in 1859, under Haussmann orders. Here starts the real open-skies Canal St-Martin. The covered part (from Bastille) is now the Richard Lenoir Boulevard. This was done in the middle of XIXth century to allow the reunification of the outside districts to the city. There are 9 locks to face the 25 m level difference. The Canal crosses here the "10ème arrondissement" a very working-class district. All along, footbridges and bridges allow the inhabitants and pedestrians to cross the Canal. They also give a nice global view of the Canal course. And the Canal goes further, another time underground, just to pass under Stalingrad crossroads.