If you are doing a time out tour (staying in hotels), a travel iron/hairdryer will come in handy as many european hotels do not provide these facilities.

Vicki - Contiki Staff, Europe Article on Suggested packing list - Europe - Summer

During the summer there is a huge line up of various ballet concerts available. Make sure you go and see one - where better to see Swan Lake than in St Petersburg?

Mike Contiki Article on St Petersburg

As a Contiki driver myself, I have to say that this flight has some of the most awesome scenery that I have experienced in the 31 different countries that I have worked in!

Explorer1097719 Article on Optional Excursions - Lake Tekapo