We booked a privet 6 hour tour with Mariusz in Barcelona, it was money well spent. I had a couple sights in mind for the tour but the rest I asked Mariusz to pick. We saw many great places and Mariusz was very knowledgeable about all. I could tell he had a lot of information on all subjects but he could pick up on what interested us and talked more about that subject, it was appreciated. He not only showed us Barcelona but also gave good suggestions on where to eat and what to see on our own time.  We had a fun time and got great pictures.  Mariusz also communicated with me before the trip well and even after sending me pics he took and letting me know where I can get Covid tested. This was a great intro to Barcelona for we took the tour our first day of our trip. Thank you Mariusz!