Oh, that? Just a selection of 1970s era experimental hovertrains designed to go up to 300 mph, now sitting abandoned along a random side street in Pueblo, Colorado.

These are not great pictures because the trains are behind chainlink fence with barbwire and a sign that says BEWARE OF DOG. They seem to be on the property of someone's welding shop? Or body shop?

This one is a Rohr Industries Aerotrain.
https://en.wikipedia.org/wiki/Aérotrain 

This is the Grumman Tracked Levitated Research Vehicle (TLRV).
https://en.topwar.ru/86917-proekt-aerovagona-na-vozdushnoy-podushke-grumman-tlrv.html

This one is furthest from the street and hardest to see. It is a Garrett AiResearch Linear Induction Motor Research Vehicle (LIMRV).
https://en.wikipedia.org/wiki/Hovertrain#LIMRV