^^sis, it depends on what you are looking for..First and most important of all ☺,what is your budget? Then, what is your theme? What type of wedding are you going for? When is your wedding? There are so many beautiful wedding venues in Tagaytay, it's quite difficult to just pick one. Oh by the way, one factor to consider also is your church? Since Tagaytay is the 2nd or 3rd wedding capital in the Philippines, churches gets booked quite easily. If you've backread, one of the problems that easily arise is that the coveted date and time has already been reserved especially, if it's a weekend wedding. Most brides reserve the church first, then venue to follow.
If you want a garden wedding type and you've got money to spend you can try Angelfields, Hacienda Isabella, Pintoresco, Narra Hill, Antonio's, Tagaytay Highlands, Taal Vista Hotel.
If you want an indoor wedding with a grand feel you can try Mahogany place, Club Ananda, Alte Veranda de Tibig, Nuvali...
Granted that some of the places mentioned are not in the Tagaytay centre as is (but like Hacienda Isabella and Pintoresco- they are near-ish to the Tagaytay area)
If you're a bit budgeted, others have also mentioned it.
Other venues worth mentioning as well are Sonya's garden, Balay Taal, Mahogany Garden, Balay Indang, Sandari Batulao, Balay Dako (new venue- I believe this is the former Antonio's breakfast). I might've missed some, but you can also backread on the previous threads for other's recommendations, comments and violent reactions. Happy preps and good luck.