Madonna, 65, cuts a low-key figure as she visits the Casa Batlló in Barcelona after performing two stellar shows for her Celebration Tour

Madonna was spotted visiting Casa Batlló in Barcelona on Friday after two hugely successful shows in the city as part of her Celebration Tour.

The 65-year-old has been on a whirlwind European tour and on Wednesday and Thursday night she performed at the Palau Sant Jordi arena. 

The pop icon donned a Nude Project Playboy varsity cap with a black puffer coat as she wrapped up for the outing. 

She chose to keep her hair out of her face in two neatly tied plaits and accessorised with a pair of black sunglasses. 

Madonna kept her face low as she was hurried inside the iconic tourist attraction. 

The UNESCO World Heritage site was designed by architect Antoni Gaudí, and is a must see for anyone interested in creativity or art history.  

The Material Girl artist will be heading to Lisbon next week for two shows on November 6 and November 7.

Whilst Madonna has been in Barcelona, she has kept fit and healthy by riding a bicycle around the city. 

Earlier this week she enjoyed a break between concert dates, after playing Stockholm on Saturday night, and seized the opportunity to get some fresh air.

As autumn progressed and temperatures dropped, Madonna had bundled up in a cozy-looking set of sweats and a pair of gloves.

Her outing came one week after she confessed onstage that she was feeling unwell, all while reflecting on the shocking health crisis she suffered over the summer.

The Celebration Tour was meant to begin in mid-July with a North American leg that would sweep through over 20 cities in the United States and Canada.

However, that leg had to be delayed after Madonna's health took a sudden downturn that struck terror into the hearts of her global fanbase.

She was confined to the ICU for several days after contracting what her manager announced was a 'serious bacterial infection.'

A report in Radar Online sensationally alleged that she suffered acute septic shock and was revived with Narcan, which is typically used to treat overdoses.

Onstage in Antwerp the Saturday before last, she admitted to the crowd: 'I must tell you, I don't feel very well right now. But I can't complain because I'm alive.'

She remarked that it was a 'f***ing miracle' that she survived her hospital stay, sharing how 'grateful' she felt to have pulled through.

Madonna explained that her ordeal had put her in mind of her mother, also called Madonna, who died of breast cancer at the age of just 33.

'I had this strange thought,' Madonna said at her Antwerp show. 'I suddenly had sympathy and empathy for my mother.'

She elaborated: 'About how lonely she must have felt in the hospital, knowing that she wasn't going to live. And I was given another chance.'