If you can only go to one additional site outside of La Sagrada Familia, this is it. The audio tour provides all the history of why Antoni Gaudi designed the way he did. I have a whole new appreciation for his work.

This was right down the street from our hotel but I'm glad we had a guide because we were able to skip the long line outside and even if you have to wait it's worth it. The house itself is downright whimsical but the immersive experiences inside were wonderful and you want to make sure you see them. Gaudi didn't like straight lines because he felt they didn't exist in nature and he loved a lot of light and you'll really see that in the designs at Casa Battlo. He also had a way of working with tiles. You definitely want to go up to the roof - the dragon's back. The whole structure is like something you'd imagine in a fantasy story and it's worth a visit.

Really incredible museum and house. Even at the earliest times it gets really crowded but id say its worth it. You wont be let in until the time on your ticket so if you show up early you’ll be standing im the HOT sun for a while.

We found out about the Magic night - casa visit+concert on the roofetop, and bought the ticket online, they offer you different packages, ones include skiping the line, having drinks, ... you decied what is the best fit for you. The visit is nicely structured, the audioguide guides you smothly. The arhitecture is breathtaking At the end of it, you reach the terase, where the concert takes place and the bar is. The atmosphere gives you a warm and unique experience

Casa Batllo is the best of Gaudi's private houses. Though expensive, it was worth it. The interior is as amazing as the exterior. The blue marine theme inside is magical. Buy tickets online to save money. Backpacks could be left for free in the locker room (you would need 1 euro which would be returned to you).

One of the most outstanding Modernista design buildings in BCN. Since it is along the Passeig de Gracia, a very wide street with wide sidewalks, it is well-positioned to view and to take photos. This is a major tourist site and there area always big crowds around, except late at night.

I’ve loved this idiosyncratic building ever since I first saw a picture of it in a modernist architecture book. So it was quite a thrill to see it in person. Gaudi’s unmistakable flourish, quirky, fairytale quality, colourful mosaics, wavy roof and rich imagery.

Great place with an amazing story of the architect. It’s a must see when in Barcelona. We got the gold package as it looked like the lines were crazy long. So it was a bit pricy (45 euros each). Very cool though and worth it.

So different! So elegant! The flow of the shapes, the blend of colours… sat in front of it just to enjoy the look. Beautiful is in adequate to describe another of Gaudi’s creation. We didn’t book tickets before hand so we didn’t have time to go in. Really regretted that.

Of all the sights we saw in Barcelona, this one was my favorite! Definitely get tickets in advance. Everything was well organized. I didn't understand the purpose of the small tablets at first, so that could have been better explained. The immersive film at the end was really cool.