The cache is NOT at the posted coordinates. You will have to solve the puzzle to get the coordinates. The establishment locks its gates at 7PM.
This type of puzzle is done by replacing part of the url with the next step. As an example. The first page in this puzzle is at http://flowten.xyz/whatnext/1.html and last portion of the address is 1.html. The next step in the puzzle would be to replace the 1 with a 2 so the new address would look like http://flowten.xyz/whatnext/2.html
Some rules to make it easier:
1) Always use the same format as the clues.
2) Convert all capital letters to small letters.
3) Only numbers,letters, dash, commas, and underscore are allowed.
I have not seen a puzzle like this in our area so I hope you like it. Give it your best shot before you send me a message. Google is your friend.
Start the puzzle here. Puzzle
You can validate your puzzle solution with certitude.