UNESCO listed Bern, Switzerland
Bern is a medieval Swiss town - and has earned itself the Unesco World Heritage status - with a laid back and friendly demeanor it is possible to walk around its old town literally within 20-30 minutes.
Note - Do find time to sample sorbets at Gelateria di Berna, a Bernese institution, that creates unusual flavours like hibiscus flower, strawberry and balsamic vinegar, and chocolate sorbets...