Independent Travel
You can choose to book a tour of countries through a specialist travel agent or plan your own itinerary.
Interrailing in Europe
This is a popular choice for young people. Tickets can be purchased for one specific country or a “global pass” covering 30 listed countries. https://www.interrail.eu/en
Specialises in student and gap year travel, both independent and booking guided tours
https://www.statravel.co.uk/home.htm
Advice about world travel and round the world flights etc
https://www.gapyear.com/round-the-world-flights