Longwood Gardens speaks for itself.  It was made for engagement sessions (or at least photographers would say that) and works so well.  There are so many locations that work, that I never end up doing the same route for each session that I shoot here.  Even with the conservatory being regulated right now for COVID with not allowing people without masks and not allowing lightstands, there are so many grounds to work with, that I'm never able to use everything in a single session or else we would be there for 3+ hours.  They do not require permits anymore so the only requirements that I personally have are the cost of admission and a small travel fee due to the distances from Philly.  But I'm more than happy to schedule your engagement session here because its makes my job so easy with all the florals/fountains/greenery to work with.