Dry Dry Desert Location
So there is a location known as Dry Dry Desert that shows up quite a few times throughout the Mario series. In it is a place known as the Dry Dry Ruins which are raised in Paper Mario 64, and can be seen in future games as Mario Kart Tracks. But this isn't the only time this desert shows up.
So first in PM64 we see a train referred to as the the K64, travels East to pass through Mt. Rugged and into the Dry Dry Desert. Why am I saying this? Well..... In the track Kalimari Desert there is a train that runs through that looks very similar to the K64. Now someone might say, well that's Kalimari Desert not Dry Dry Desert. Well...... hehehe. Kalimari Desert is Karakara Sabaku in Japanese, meaning Dry Dry Desert. This is also the Japanese name of Dry Dry Desert. It's the same place.
In Paper Mario: Sticker Star there is a desert you travel by going East called Drybake Desert. Turns out Drybake Desert is called Kara Kara Sabaku meaning Dry Dry Desert. Again this desert shows up up, and in Sticker Star we see a Yoshi Sphinx. What's notable about this is in the Mario Kart Wii of Dry Dry Ruins there is a Yoshi Sphinx. Since this desert is to the East the it's probably part of the Desert we see in New Super Mario Bros Wii, and New Super Mario Bros DS. Both of which you travel east from the Mushroom Kingdom to get to. The great Desert is probably called Desert Land or Desert Hills since that place is implied to be East of the Grasslands. Further backing this up when lore hunting in Mario Odyssey I noticed in the horizon what appears to be a valley and desert which is again to the East.