- steep surfaces are both too rounded and textures look like a stretched pixel strip across the whole surface; most mountains look very underwhelming when nearby and flying inside Grand Canyon/Marble Canyon looks weird
- some 3D tiles aren't linked properly, leading to sudden discontinuities in the surface; try to e.g. fly through the Remarkables mountains north to Queenstown, NZ
- some water bodies are upside down, instead of being in a valley they were processed as "aqueducts"; see Victoria Falls in Africa for a very long "aqueduct"
- certain geographic locations have invisible borders one can crash into; try to land in the Badwater basin in Death Valley
- when cities switch from procedural to photogrammetry, the detailed city doesn't match its surroundings color-wise and usually ends up very dark
- many bridges include water underneath as a wall; SF Bay is full of them
- satellite imagery is not consistent (usually corresponds to Bing Maps one) and in many places one can see sharp borders between tiles coming from different satellite scans
- some interesting parts of the world don't have consistently high resolution like Maldives or Kamchatka
- roads are often projected as textures onto a steep terrain and no effort was made to carve them out
- certain type of green is sometimes misidentified as a forest, leading to obscuring some great views like Kalalau lookout on Kauai etc.
- some taller buildings end up looking like pyramids from a distance due to the used shape simplification algorithm; I saw German pyramids near Mannheim that way