Eurail offers two choices to travelers, one is the standard Eurailpass for daily travel and the Eurail Flexipass which has a validity of two months and you can travel on select days during that period. Eurail passes are valid in 18 European nations and also cover ferries in some countries. They do not cover the UK. A one-month first-class Eurail pass costs $1365. The Flexipass lets you travel for either 10 days or 15 days over two months. The 10-day pass costs $1000 and for $1319 you can get the 15-day pass.
To read about even more Eurail options and how you can save with Eurail passes, go here.