Mars tourism makes no sense, as there will be nothing whatsoever on Mars that you could even see for the next hundred years or more. An actual colony on Mars is

Mars tourism makes no sense, as there will be nothing whatsoever on Mars that you could even see for the next hundred years or more. An actual colony on Mars is way beyond our current technology, despite what some "futurologists" claim. And even IF a colony on Mars is ever created, the amount of tourism it could ever imaginably sustain would be tiny compared to, say, New York or Tokyo or Paris - and neither of those, nor even all three together, are 1/8 of global tourism. Not to mention, a colony on Mars would just be tunnels in a desert (except it's a very very cold and highly radioactive dessert). Only a tiny handful of people would even be conceivably interested in spending months on a cramped rocket to visit it.