I would give anything to go back in time to sit with my grandmother, eat a slice of her chocolate cream pie, and introduce her to her greatgrandson.

Otherwise,
Manaus & Curitiba, Brazil - churrascaria & flavored cachaça & caipirinhas.
Pordenone, Italy - fantastic coffee and pastries at local coffe shops.
Plzen, Czechia - beer

There are others.