I always wanted to see the stars, so for me it would be the Atacama desert in Chile. I most likely won’t be able to go to space, but I could see it like I was there. Maybe I can go traveling to the socialist homeland countries, like Vietnam (I need their Pho). Stalin’s grave, Stalingrad, and the Mausoleum would be an obvious too.
I would like to go around the world using the small, local railways and bus lines that stop everywhere. For a tourist, in my opinion, there is no better time to get to know the people of a country than when they are also travellers. I would take my time, try all the foods, and visits all the sites the locals tell me to. I would especially focus on the more remote and rural areas that don’t have HSR yet, and write a book or a blog to promote tourism.
Free public travel across the world would be absolutely wonderful. Just hop on one day and decide to go across the country to see and eat new things is the peak of potential society.