I did some research and Four Seasons has an intriguing concept - for $147,000 per person (based on DBL occupancy) they will fly you to nine destinations on four continents for 24 days of course staying at Four Season's five star properties along the way. Very pricey obviously but all things considered probably a relative bargain which is why they are wait-listed for these tours. The Four Seasons has come a long way since it began as a single motel ("motor-inn") in the 1960's just one block from where I live. https://www.fourseasons.com/content/dam/fourseasons/images/web/JTT/pdfs/International-Intrigue-2020-Brochure.pdf