Im planning to be in Paris for a week in July. If I decide to go London for one day, is this a good idea?
how far is from Paris in train? how much is it?
is not too much stress ? should I stay over nite in a hotel in London better?
I hear ideas and recomendations please!!!

What would you do in London?

Well it is the center of the known universe so I would have to give that a big yes. AND they have one of the best if not the best grilled cheese sandwiches on the planet. Don't forget Westmister Abbey, that's good too.

www.eurostar.com

ok thanks guys
I just wanna see the main places and sightseeing

How far is from paris? how expensive? should I stay in a hotel over nite?

Can be done in one long day. Look at the Eurostar website!

It can be done in one day or you could stay over and experience London in the evening too. I would go eurostar too, it's a bit pricey but the fastest way of getting here and then get a travelcard so you can travel all day on buses and tubes for one price. There's so much to do in London, a lovely stop is getting off at Embankment tube, walk up to Trafalgar square, then up the Mall to Buckingham Palace and then back down, cross the river and walk down from London Eye along the Southbank taking in the tate modern, Globe theatre, Tower Bridge and then cross over that to Tower of London. If you have the energy for more, stay with a host from www.airbnb.com. You can book a room for £20 upwards pretty centrally and then you could do the nightlife too!!
Hope you have a great day!