I'm going to take the Eurostar to Paris for a couple of days. Paris is 2 1/2 hours from London via the EuroStar. That's the super fast train that travels part of the way under the British Channel (Approx 34 miles).
Round trip cost $74 US
It will be my first visit to Paris and I'm sure it won't be my last!
(I just loaded the French Tutorial App on my iPhone---yikes!!!0