To be honest, it feels as if almost the entire city of Orlando is extremely haunted locations - from normal parks down the street to downtown... I have many places to visit as we just settled into our new apartment, but i'vealso already visited many... recently we visited Lake Eola which is very close to many historical and haunted places.. the most haunted place I came across in our short trip last week was Dr Philip Philips estate... I could feel us being watched from the bottom left window, took pictures in succession of the house, and as soon as I asked if it was the Dr was the one watching us, we stopped getting responses and I felt immediately "I knew it, it's not him, it's bad". I told my fiance it was time to leave and said goodbye. When I looked at the pictures after, sure enough, one of the pictures zoomed in was extremely disturbing.
Disney World and the area surrounding it for several miles after leaving are extremely haunted as well - we're annual pass holders and i have to do prayers of protection each time we go, and extra ones as we enter specific rides. I got heart severe and sudden heart palpitations out of no where on Pirates of the Caribbean a few months back and it took me about 20-30 minute's to "fully" recover, I had to fight passing out and rest for a bit after. (I made sure i was hydrated, so it wasn't related to anything along those lines)
According to google however, the most haunted place in Orlando is the Orange County Regional History Center, which is one of the next places on my long list.
Also i'll attach a picture of the Dr Philip Philip's house, as well as the disturbing find when i zoomed in on one of the pictures. (WARNING: The zoomed picture is very disturbing... view at your own discretion)
Also here's a list of the majority of the known haunted places in Orlando
Haunted Places in Orlando, Florida | Haunted Places