Walked from the Louvre to the Oblisks down the Champs d'Elyees to the Arc de Triomphe. From the Arc I walked to the Eiffel Tower and took the elevator up to the top. Despite the rain the view was fairly clear and the advantage was that there were only a few other people at the top.
Took the Metro to the Paris Catacombs. My mom had read about this and suggested it to me. My thoughts were how could 6 million dead pariasians be wrong? There are miles of abandoned limestone mines that are packed with the bones of 6 million people. It was incredibly surreal, either side of the corridors are stacked to within inches of the ceiling with bones. The retaining walls are made of thigh bones inset with patterns done with sculls. It sounds creepy, but it's so extreme and the bones are so mixed up that it isn't at all disturbing.
Spent the afternoon and evening doing my laundry, ah the joys of traveling with only a backpack...
Went out and spent a few hours walking around the Latin quarter.