Here is the Travel Mug visiting some distant relatives. Make your guesses in the comments section. I will keep adding hints for a few days.
Hint #1: the Mug kept referring to them as
FarMor and MorMor. I stand corrected, the TM would have been calling them either Grossmutter or Grand Père/Grand Mère.
Hint #2: Both town and country where this photo was snapped are known for cheeses.
Hint #3: This photo was taken in a castle in the foothills of Moléson.
Well, the guessing is done. We have the answer for you! The Mug is shown here in Gruyère, Switzerland at the Château de Gruyères (if you really want a view check out the photos of it here — that is one lucky Travel Mug!)