Two weeks in Europe

The first thing you can do is get a copy of RS Europe thru the Back Door and read it. It is full of useful information about European travel. Then you need to decide what your interests are and what you want to see while you are there.
Then you should come back to this web site with some specific questions that might generate some answers rather that such a general question that you have asked that is hard for any of us to answer. Two weeks is not a lot of time when starting in London and ending in Barcelona. Remember, for every move you decide to make, you will loose most of one day in checking out-traveling-checking in. If your two weeks include the time to get to London and the time to return from Barcelona, you have already lost two or three days from your allotted time. Good luck and the more research you can do the better your experience will be.

I am going to be there for a total of 16 days and I have been to Europe but this time I am backpacking around with a few friends. They suggested London-Paris-Amstredam-Berlin-somwhere in Switzerland-Rome- and then to Barcelona but that is just way to far in to little time. The whole trip would be spent on trains.

Michael:
What do you and your friends want to see and doare you interested in urban areas or the countryside? Have any of the others been to Europe before? You might want to consider flying from London to Amsterdam, then travel by train to Brugge, Paris, Bordeaux, Toulouse and then to Barcelona. Such a trip keeps you on a north to south bearing without backtracking. Allow at least two full days and nights in London, Amsterdam, Paris and Barcelona, and at least one day and night in Brugge. The balance of your time will be mostly riding trains.

Paris-Bordeaux-Toulouse-Barcelona adds a couple of hundred miles of deviation to places of lesser interest than those along a straighter line.

I would consider London-Paris-Madrid-Barcelona. Or add Brussels/Bruges and subtract Madrid (personally Madrid is a favorite of mine, more than Barcelona). You will want to nail down your overnight train reservations in advance, as soon as possible. I think Amsterdam, Rome, Berlin are too far out of the way. If you are sticking to big cities, you do not want two night stays so limit the number of stops.

Remember that when you are with a group of people you can move much slower than by yourself. The whole group will move at the speed of the last one to breakfast, the one who needs the toilet, the one who looks in shops or does whatever to move more slowly. You can't get on the train until the last one is ready. So I suggest looking carefully at moves from one place to another. When you are in a place different members of the group can do different things. When traveling its much harder.

What Nigel said. Think of the concept of attempting to herd amoebae.

What Nigel said. Think of the concept of attempting to herd amoebae or jellyfish.