As many of the reviews have suggested, this estate isn't that great on the inside (from what you can see), but the grounds are so large! We started out thinking we really weren't going to see much on the grounds other than trees, walking paths and bushes, but then a person said we really should stand in line to see the "well" (that wasn't really a traditional well, and we did. It was worth the wait that wasn't that long anyway. You go down the steps inside the well type thing and then enter the underground tunnels. It didn't take a lot of time, but it was quite neat and worth seeing. And there's also a cafe on the grounds where we ate lunch -- nice views, too!

The palace isn’t anything particularly special inside, but wow these grounds are stunning! The well and caves especially are a highlight. I arrived before opening time to join the queue, then headed straight to the famous well to enjoy it before it got busy

What an interesting site. Loved it. And, we went on a Saturday in November and really minimal crowds. We bought our tickets online and just walked in but the queue for tickets was just a handful of people. Then walked right into the well too, where we read about 1 hour lines in other seasons. Really fascinating grounds and building, and very pleasant walking. And, just a short 20 minute easy walk from the train and back. We will go back to see the other sites since we're in Lisbon for awhile, but this was a good one. Highly recommend.

We visited here on a misty December day and it was gorgeous, the gardens are enchanting and beautiful in an ethereal way. We had a guide who explained the history of the place and how it became somewhere sought out by romanticists escaping from the noise of the Industrial Revolution and I can see why. There are towers you can climb if you are able and don’t mind steep winding staircases, you almost expect to see fairies out of the corner of your eye. The house is quite small but very interesting if you take time to read the information. We spent a couple of hours here and would have stayed longer if we could.

If you want to have an great experience, i would recommend this one! Lovely garden with magnificent infrastructures. Plenty of things to do, places to relax and descend the Poço Iniciático. Poço Iniciático is an wonderful experience and enjoy the surprise when you reach the underground.

Forget castles, visit Quinta da Regalia with it's mystical house and gardens. What a treat this place is to visit. Every corner in the garden built on the mountainside has a cave, grotto, waterfall or tower to see or climb on. Beautifully landscaped, make sure you climb down the well and to the top of the largest tower. Only about 20 minutes walk from the town of Sinatra you'll need to be reasonably active if you're going to fully enjoy the gardens. An absolute must to visit.

Beautiful gardens in a gothic / sublime style with hidden paths grottos and underground passages. Nice cafe. House is completely over the top gothic style - don’t get to see that much of it (only ground floor) but the info and story of the house and people is interesting.

There are so many options to visit in Sintra and we had a day so we were really pleased with our choice of monument. The whole estate is like something out of a fairytale with towers, water, bridges grottos and beautiful gardens. So much to see, we spent at least 3hours looking around at everything. Weather was sunny, so perfect for photo opportunities. Would definitely return as we probably didn't see everything.

Our favourite stop in Sintra. Weather was gorgeous and the grounds were beautiful. Not bloomed but we explored and saw everything. The well was good as were all the nooks and crannies of this place. We spent a good couple hours here. Get tickets ahead of time.

Lovely place to visit, much better than any of the other sites and we wished we’d just spent time here. Lots to explore, and our two children (two and four) loved it. It’s a lot of walking and climbing, but great nonetheless.