The environs are the areas surrounding a specific place. If you want to go to Boston and its environs on vacation, you might spend time in downtown Boston, but you may also visit Cambridge, Braintree, and Lexington.
In general, the environs are the areas surrounding a particular place or location. Environs is a plural noun taking a plural verb, and it comes from an Old French word, environer, meaning to enclose, surround, or encircle. When you book your hotel reservations, you should make sure the environs around the hotel are safe. No matter how clean the hotel is or how good the breakfast, you wouldn't want to stay in an area where you would be leery of going out at night.