To many travellers, the Eiffel Tower is synonymous with Paris, and it certainly is a must visit site. Though it may at first seem like an ugly brown tower, spend some time looking at the Eiffel tower and you can't help but find it impressive. Climbing the tower can require long waits, especially if you take the elevator up the first two levels, so walking them may be a better choice if you are up to it. You will still have to wait in line for the elevator up to the top, but the views once you get there are perfect. Inside the observation deck is some information about the tower and, of course, windows for those who prefer not to go outside.
From the outside you can see all of Paris. Because many attractions are closed on Monday, the tower is more crowded that day. Visiting at night can also be fun, the tower lights up and sparkles and you can see why Paris is called the City of Lights. One of my visits to the Eiffel Tower was cut short by a torrential downpour, but watching the storm come in from the top of the tower was beautiful and completely worth being drenched. If you don't want to climb the tower, take your traveling companions, a blanket, and some wine and cheese (or whatever food you'd like), and sit on the Champs de Mars starting around sunset. Parisians, especially students, and some tourists (though I saw surprisingly few), get together here for an evening snack and to watch the tower light up and sparkle.