Yellowstone Shares Amazing Retro Posters from 1928 Opening

It's hard to get more old-school than this. Yellowstone National Park has just shared 3 posters that were used to advertise the opening of the park dating all the way back to 1928.

This is what Yellowstone had to say about these vintage posters a few days ago.

For a better look at each individual poster, here they are.