Montparnasse Tower is the 3rd largest building in Paris. Eiffel Tower being 1st.
Montparnasse offers some rally good views.
From Invalides station, we jumped on the Metro 13 to Montparnasse station.
Once we got out, we went straight for the entrance to the Montparnasse observation deck.
The lady there said to come back at 3pm because it is not clear right now. So we went to the Jardin du Luxembourg and the Pantheon.
After that, we decided to head back, instead of walking like we did, we jumped on the bus. Again, a good idea to have that book of passes because the ticket also counts for the bus.
Once we got back to Montparnasse Tower, there was a long line because of middle and high school student groups (I believe they had the week off). Not too much of a wait and we got to the top indoor floor. Where you could go get some good views from inside and behind the glass.
If you wanted to outside views, you would take a few flights of stairs to the top. Very nice views, it was cold and in the middle, people were “ice” skating (which I found out later is only white plastic).