If you buy a Navigo weekly
transit pass, the one-week time period begins
on Monday (and only on Monday). More...
Many are closed on Monday—check before
The Catacombs are closed.
Monday is not the day to make the excursion
to the palace—it's closed. (The
best day in summer may be Sunday.)
Some are closed on Monday.
Most markets are
closed, but some flea markets are