Travelling by train is the cheapest option if you’re visiting Europe. Especially if you’ve opted for a trip that includes more than one country. Apart from being the cheapest, it can also be pretty scenic and breathtaking along most routes. RailEurope.com is an American website that combines over 50 different European train companies and helps you book your tickets and find the best deals.
The website is also very helpful for those who are travelling by train for the first time and it explains the difference between a ticket and a pass, it helps you book the cheapest tickets, it gives you advice on the most popular routes and gives you useful tips for once you start your journey.