If you want to keep a place secured and want to know what is going on that place every now and then, then you can deploy a security guard at that place. But with a security guard deploying at that place, you may not get picture of that place every minute. There is a very interesting solution out there for you.
If you want to put a vigilant eye on a particular place, then you can do so by installing a outdoor wireless security camera at that place. No matter how rough or oppressive the weather is, the camera will work constantly without asking for a break. And you will get crystal clear picture of that place every second. So, if any thing wrong happen at that place you can take immediate action. Then, is there any requirement for deploying any physical security?