If you are at all interested, National Geographic/Lindblad does a cruise aboard their ship, Explorer. I did the cruise last year and we had the opportunity to have Mikhail Gorbachev speak to us in a small auditorium. And, coming aboard the ship, Lech Walesa talked with us with his arm on the bar for about an hour. Each person also had the opportunity to have their picture taken with him. Though extra, you can attend a performance by the Bolshoi ballet.

I thought the itinerary was great and you might want to check it out. Great ship and a wonderful group of people.