The cache is not located at the above coordinates. Parking is nearby but on the school grounds. I do not recommend hunting this cache while school is in session.
Solve the puzzle by determining the values for each X to retrieve the true coordinates.
N 34.0X.XX0 W 084.XX.XX0
his+horse+is=slain
the+under=world
it+takes+a+little=effort
pacific+pacific+pacific=atlantic
idaho+nevada=states
get+along+little=dogies
youve+never+been+to=europe
Once you've determined the coordinates and arrive at the cache, I hope you enjoy learning a little bit about this place that was built in 1935. Can you imagine having your high school prom in this building?
You can validate your puzzle solution with certitude.