Dinosaur Footprints in Holyoke, MA is a site along Route 5 where the public can see and touch footprints made 190 million years ago. It’s free; there’s a small pullout along the road, marked by signs. A short, easy walk leads to the trackways.
The prints were discovered by workmen building Route 5. The trackways continue up to the retaining wall supporting the highway, and presumably under it.
There’s graffiti on the retaining wall. When I was there, there was a tribute to Ray Bradbury, who loved dinosaurs and wrote about them in several stories (most famously in “A Sound of Thunder”). But the local “community artists” have left the trackways alone.
The prints have been colored white with chalk to make them more visible. I can understand why they did it; it would be very difficult for untrained viewers to see them otherwise. But that makes it hard to see the details, and those glaring white prints make it hard to notice anything else. Some kind of map with outlines would be better, but I guess that would take time and money.