Of course, the two of them have traipsed all over Europe before with Cassie... so yeah, it took a bit of brainstorming to figure out other stuff for them.
TRANSCRIPTION COURTESY OF JOSEPH HOUK - [BG and MG are on a 747 heading across the Atlantic] (MG) "Let's see… What haven't we tackled in Europe yet?" (BG) "I do know I want to go back to London and see other parts of England." (MG, as they peruse a "Traveling Europe" tour book) "We could go to Liverpool and catch The Beatles at the Cavern Club!" (BG) "Or we could always see what the very first Cannes Film Festival was like!" (MG) "Hmmm… And then go up the coast and take in the very first Monaco Grand Prix!" (BG) "How about we go back to Germany in 1989 and party at the Berlin Wall!" (MG) "Maybe we can go back further and say hi to our great-grandparents!" (BG) "I… don't know about visiting our ancestors. I'm afraid that one careless move and one of us would vanish!" (MG) "Oooh… I forgot about that. Maybe I'll stick to the archive places. Though I'd still like to know if I'm related to Dave Gahan of Depeche Mode!" (BG) "How about we just go and make our clothes vanish in Ibiza instead?"