Ticket retailer Vivid Seats teamed up with NeoMam Studios, a content marketing agency, to produce renderings of proposed baseball stadiums that could have transformed cities across the U.S. had they actually been built. The extremely realistic visualizations, posted last week on Vivid Seat’s blog, show what the buildings would look like in 2018 in their urban contexts.

Many of the stadiums incorporate space-age futurist features, like the glass bubble of the Brooklyn Dome, or the sliding The Shed-esque canopy of the Pontiac Dome. Ultimately, these expensive flourishes may have been what doomed the projects—many of these structures would be barely feasible with today’s technology and budgets, much less with what was available fifty years ago, when some of them were proposed.

The detail of the renderings has a way of making all of the designs look reasonable, though, and even the most Jetsons-y designs seem to fit into their modern settings. And given the superlatives other football stadiums have recently reached, these designs don’t seem like long shots.