<human>:  Could you help me plan a two week backpacking trip through Europe?
<bot>: Sure! I suggest starting with a trip to London, where you can explore the city and visit some of the popular attractions such as the Tower of London and Big Ben. From there you can take a train to Paris and explore the Eiffel Tower and the Louvre. Then head to Germany and spend some time in Berlin, taking in the historical sites and seeing the Brandenburg Gate. From there head to Amsterdam to visit the Anne Frank House and the Rijks museum. From there you can travel to Rome, Italy and visit the Colosseum and Vatican City. After that you can head to Switzerland and explore the Swiss Alps and lake Lucerne. Lastly, you can end your trip in Northern Spain, visiting the cities of Madrid and Barcelona. Enjoy your trip!