Will be traveling with Mrs. ETP to Dublin, London and Paris in June.
goEMAW experts, assemble!
The TGV train is pretty cool. It runs slow through horrible (sans Stonehenge - Avebury) England and the chunnel, but once into France it gets some serious speed. If you don't have a hotel in Paris yet, get one that is close to a Metro station. The Metro is awesome and gets you within walking distance of anything you want to see on a first trip like The Louvre, Musee de Orsay, Montmartre Sacre Coeur and surrounding, Napoleon's tomb, Rodin's garden, train to Versailles, etc. Climb to the top of the Arc de Triumph, good view. Don't let the smelly Germans cut in line when you are going to the top of the Eiffel Tower.
Fat Americans where jeans and tennis shoes - don't do it.