There was mold both in the bedroom and in the bathroom. The mold was not visible on the pictures displayed on the AirBnB website. In the bedroom the moldy corners around the window were just beside the bed, which meant sleeping in an unhealthy environment. In the bathroom the mold was even more intense, growing over a large area above the shower and in several corners. (see pictures) Already after the first day we had issues breathing, sometimes coughing, when exposed to the mold for more than 1h. The bedroom and bathroom smelled humid, probably due to the waste water smell coming out of the plughole in the bathroom. Furthermore, for two days the apartment (hallways and staircase) smelled like urine and fishy. We had to move out early and did not get the refund that could be expected in such a case. Furthermore there was a very loud building site in front of the house, about which the host did not inform us in advance. The building site made the house hardly accessible with bigger luggage or bags. I highly recommend booking a different AirBnB in Porto.