Using SSL is not mandatory to enjoy the site. It is there as an option if you feel safer using it.
To browse using SSL, use the following URL:
Note: On browsers such as Chrome, YouTube embedding will not load as it is considered unsecured content in a secure zone. You will need to manually tell your browser to load the videos by clicking on the shield icon in the address bar and selecting "Load Anyway". Firefox and IE may warn you as well.
The code is hidden in the tumblers. One position opens the lock, another position opens one of these doors...