Comedy and fantasy movie - mysterious castle, strange altar and stone griffins

I’m looking for a comedy movie (between 1980 - 2000 max). My friend watched this movie in 2007 or 2009, but it is older definitely. Perhaps made in USA or Germany. I checked all IMDB filters with different keywords and... nothing fits. It's strange situation. Perhaps it hasn't exact description in IMDB database.

A marriage (they aren’t too young) with their friend on vacation, perhaps some island or small sleepy town with a castle. The woman is appalled that her husband doesn’t remember their wedding anniversary. He gives a flowerpot with a cactus as a gift for his wife. Then, she leaves the hotel and explores the town or an island. Then, a strange guy notices her (he is an elderly man with long gray hair) and he offers her a walk. He buys her a red dress. I remember he tells her he lives in a castle and invites her there. He gets her drunk or gives her something and carries her to some sacrificial altar, at this her husband rushes in and on some tower, he fights an evil man. Then, he brings to life the stone griffins that decorate the tower. Everything ends well (typical happy end) and the final scene as how all three of the wife, husband and their friend sit outside the hotel and ride away on donkeys is how the film ends.

One from actors could be similar to Danny DeVito, but I doubt that it is Danny Devito, because he is too popular and he didn't play in fantasy/comedy movies.

Definitely not:
High Spirits (1988)