French Spiderman climbs Barcelona skyscraper harness-free

French "Spiderman" Alain Robert scaled one of the tallest skyscrapers in Barcelona without a harness on Monday.

Bystanders and police watched as the 55-year-old climbed up the Melia Barcelona Sky Hotel, a glass and steel covered hotel building known as the fourth tallest tower in the city.

"For me putting my life at risk is interesting because nowadays life is becoming more and more secure, freedom is becoming smaller and smaller due to all the terrorists and so on, so there are cops everywhere. Maybe we are gaining in terms of security and safety. Sometimes is kind of nice kicking a little of bit the ass of the society, it's interesting," said Alain Robert.

The urban climber is famous for his daredevil, harness-free approach to scuttling up buildings with nothing more than some chalk on his hands and climbing shoes on his feet.

Robert has conquered over 100 structures worldwide including San Francisco's Golden Gate Bridge, Dubai's Burj Khalifa complex, the Eiffel Tower in Paris and the Sydney Opera House without safety equipment.

"I want to accomplish my dreams. Most of the people unfortunately are dreaming their life and I'm living my dreams, it's a complete and different way of living," Robert added.