Ahhhhh - finally got to Number 20!!!
Sorry I've had to slow down on these but a) school started and being a teacher takes a lot of your free time and b) I ran out of containers.
One of the greatest comdeies of all time - if you don't know it by the first hint, I suggest you rent the movie and watch it over and over again until you have it memorized. Now don't get the TV version (too many bleeps and cuts), ya gotta see the real thing.
WARNING - This is a highly travelled muggle area!
N 39° 45.AB1
W 089° 33.CDE
A = The last number of the year the movie was made minus the third year
B = The third year the movie was made minus four
C = The last number in the year the movie was made
D = The last number of the year Steve was born minus the third number of that year
E = The last number of the year Steve was born plus the third number of that year
Why here? It is on the border of a city where a large number of people fitting the description of the movie title work (hint - look for the dome).