The winter holidays have only just ended here, but many Russians are already planning their next European getaway, buying plane tickets and reserving hotels. They are also compiling bank statements, gathering insurance forms, paying fees, taking photographs, making photocopies, waiting in long lines and being interrogated by embassy officials — all to receive a European visa, a kind of permission slip to enter the rest of the Continent that like little else underscores the walls still dividing Russia from the West.