Short Term Rental Amenity Question

[Dallas Hayden]

My family owns an older 4/3 2900 sq ft (5800 sq ft including the walkout basement) ranch house in Methuen, MA. The home sits on a 1 acre mostly-flat, square, and mowed block at the end of the street. We're finally at the point where we'd like to rent the house out as a STR. We're refreshing the interior with new floors, paint, window shades, etc. and updating mechanicals/fixtures for now. Of course, we also plan to add a couple high quality TVs, good furniture, and keep the interior clean.

The back yard is marvelous and just about the biggest/nicest in the city. There is a 160 sq ft patio area just behind the house that could be used for a BBQ or fire pit. We're thinking about adding a volley ball net further out. There is also a wooded area on the side that could be used for hammocking? Have you gotten any feedback/recommendations on good cost-effective amenities for your STRs? Is there anything else we can do to utilize the extra land and make the property more appealing to short term renters? 

Thank you!