I had a case several years ago that was so vivid and fabulous that I still remember it (and still wish it WAS for real).
Background: I lived much of my adult life in or around the S. F. Bay Area, and often went for long day-trips around the area.
One night I dreamed I was on such a drive, through areas that I had driven through many times before. Readers of this thread who are familiar with the Bay Area will recognize some of this: Some fragments of that drive that I remember: I drove up into S. F. and then east across the Bay Bridge. (In real life: The approach to this bridge is a double-deck highway with a complicated architecture). In dream: The approach was a double-deck highway with a VERY complicated architecture. Next thing I knew, I was crossing one of the bridges (the Benicia Bridge) into the North/East Bay area. Next thing I knew, I was at the junction of I-580 and US101 in San Rafael. (IRL: There’s a big motel right there.) In dream: There was a multi-story building there that seemed to be part multi-level parking structure and part boat dealership.
Next thing I recall, I was driving up Route 1 towards Bolinas Lagoon, and it was getting dark. The water was black in the twilight and a full moon hung over the lagoon, reflecting on the water. Neat!
I was planning to follow Route 1 up the coast a ways into Sonoma County. But suddenly, I came upon a fork in the road that I had never noticed before! I knew that the left fork was the route I intended. But on a sudden impulse, I took the right fork because that was a road I had never seen before.
I was immediately driving up a winding mountain road in a very dense forest of fir trees – exactly the kind of scene you might see on some Christmas cards. It was getting vaguely dark, and misty, and there were some homes or cabins deeply hidden among the trees but I could just make out the light from their windows through the trees and mist.
After a few hairpin turns I came to the summit of this mountain and began going down the other side. This side (east-facing) of the mountain was nearly barren and desert-like with some sparse scrub brush here and there. It was full daylight here. I reached a road at the bottom of the hill and decided it was time to head back home, so I turned south-ish.
The scenery here resembled part of the Mojave Desert around Victorville, with some scenes from the back of my memory from 50+ years ago. There was some remains of a rock structure, and a cement quarry plant. (IRL: These were things that were really there.) And Joshua trees here and there (also a real thing).
That was the last scene of that dream. Then I woke up.
The dream was so realistic that I thought it had really happened, and I immediately began thinking of repeating that road trip. The more I thought about it, the more I couldn’t recall exactly what the route was, at least for parts of it. How did I get directly from the Bay Bridge to the Benicia Bridge? How did I get directly from there to US101 in San Rafael? And most of all, where exactly was that fork in the road that I had never seen before, that led up that mountain with all those fir trees?
The more I tried to mentally reconstruct that whole day-trip (night-trip?), the more it seemed to not make any sense. I finally began to figure out, with great disappointment, that it had just been a dream.