How can we make the most of a Thailand honeymoon?

Q We are a couple in our mid-sixties who are planning a long-haul honeymoon in December. I am happy to do all types of holiday, but my husband is not interested in seeing wildlife, mountains or spending more than three days by a pool. We are thinking of Thailand because this may provide a balance of historical/ancient sites, eastern culture and a chill-out at the end. Can you suggest a tour?
Fran Cooper, via email

A December is the perfect month, weatherwise, to visit Thailand, so it will be busy and you may want to include some lesser-known spots on your itinerary. There are obvious highlights in Bangkok — the Palace, monks chanting at dawn at Wat Po and a river cruise — but you could also…