WE ALREADY know that traveling by bus is the greenest way to travel, but now have proof that it is also the cheapest.
Here is the loop (starting in London) that they offer for that price:
Here is the breakdown of the bus tickets:
For those of you not interested in such an intense trip, Wanderu is still an amazing resource to find cheap bus and train tickets. For example, you can find a bus deal from Paris to Amsterdam for $20, and there are trips from Berlin to Vienna going for about $23.