I really enjoy the posters Amy Martin created for the 826LA Echo Park Time Travel Mart. I have this one at home. (Funds from sales support literacy programs in LA).
'Life is Bigger in Pangaea' reminds me of The Dechronization of Sam MaGruder, published posthumously, by famed paleontologist George Gaylord Simpson (a great read, by the way).
Time travel, evolution, and chaos theory (the 'butterfly effect' or SDIC, sensitive dependence on initial conditions) in that one!
Andy Rohr has created a series of retro travel posters for Mars. I particularly like the two moons, Phobos and Deimus next to the rocket.
Mars is a popular destination it seems. Ron Guyatt has done a series of retro travel posters for specific Martian destinations (available through his Etsy shop).
"This piece is a fantasy depiction of the Cryptic Region Geysers on Mars. Martian geysers are putative sites of small-scale jet-like eruptions that occur in the south polar region region of Mars during the spring thaw. These features are unique to the south polar region of Mars in an area informally called the cryptic region, at latitudes 60° to 80° south and longitudes 150°W to 310°W; this 1 meter deep ice transition area between the scarps of the thick polar ice layer and the permafrost is where clusters of the apparent geyser systems are located."
He's also imagined the famed Martian volcano Olympus Mons (amongst other sites) and made a series of Venus travel posters too.
Steve Thomas has many vintage style travel posters in his portfolio, including ones for Mars, Venus, the Moon, Saturn, Uranus, Neptune, Pluto, Titan, Europa and even the asteroid belt. Wouldn't you love to sail the methane seas of Neptune?
magpie&whiskeyjack mentioned Steve Thomas' propaganda posters, earlier this year.