Public transportation in France is very strong and their trains are fast and on time. This map shows all the routes and stations of the trains in Paris.
RATP, transports à Paris et en Ile-de-France : bus, métro, tramway, RER
Travel with Eurail Pass » 7 Reasons why you should do it [or not]
How to plan & book a journey on the Trans-Siberian Railway
Step-by-Step instructions on how to make connections from Charles de Gaulle airport in Paris by train (or taxi or airport bus) to the city center or to other sites/modes of transportation. GREAT resource.
MIIN London Train Route Planner No description http://www.comparestoreprices.co.uk/december-2016-week-1/miin-london-train-route-planner.asp
Paris Router Finder Tool
Bus/Local Train Route Search System for Kyoto
Bus/Train Route Search System "Arukumachi KYOTO"