When you enter Certain Vital Locations, you get a view of it's entrance in a First Person Perspective, almost. Here is a List and Screenshot of all the Locations that we've got to so far. More will be added.

Viridian Forest
Mt. Moon
Rock Tunnel
Diglett Cave
Pokémon Tower
Rocket HQ
Silph Co.
Power Plant
Safari Zone
Seafoam Islands
Cinnibar Mansion
Mystery Cave - Mystery Island 1
Mystery Woods - Mystery Island 3
Victory Road
Unknown Dungeon
Ice Cave - Island 4
Mysterious Cave - Island 5
Rocket HQ - Island 5
Mystery Cave - Island 6

 
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