Contiki
Contiki – Contiki has been running tours for over 50 years and is one of the most popular names in group travel. One of its unique selling points is that the company caters specifically to the younger crowd of travelers (it was voted the #1 tour company for young travellers!), and only allows those who are between the ages to 18 to 35 to go on tours.
Contiki has over 350 tours across 75+ countries, including plenty of touristy and off the beaten path spots in Europe. Many travelers like the fact that Contiki plans every part of the tour, and the busy itinerary means that it’s perfect if you want to see a lot of Europe but don’t have much time. Unlike its rival Topdeck, Contiki has more than 240 tours to Europe alone (verses about 170 for Topdeck).