A skyscraper climber, popularly known as the ‘French Spider-Man’ or ‘Human Spider’, has successfully scaled Burj Khalifa, the tallest building in the world on Monday.

Alain Robert started the climb along the glass-covered structure at around 6 PM. He moved up a central column where it is mostly free of decorative pipes, which could reduce the speed of his ascent.

He scaled the 2,717 foot-tall structure in Dubai over six hours. At night, he appeared a tiny speck already difficult to track as powerful spotlights tried to shove light on the side of the structure where he climbed.

Alain Robert even navigated through the spire that extends past the top floors of the famous structure in Dubai. Unlike his other climbs, the French Spider-Man was strapped to a safety rope and harness to abide with the requirements of the organizers.

At the base of the Burj, an ambulance with stretcher at ready parked along with other emergency vehicles. Also, hundreds of people watched as the brave Roberts climb the metal structure. Plazas and restaurants were crowded with spectators craning their necks.

Robert looked like he was not using the rope to climb his way up. Instead, he gripped the polished glass and narrow metal ridges with his bare hands and feet.

The 48-year-old human spider has already climbed more than 70 skyscrapers. These include Chicago’s Willies Tower, Empire State Building, and the famous Petronas Towers in Malaysia. He also scaled Taipei 101, which was the tallest building in the world before Burj in 2004.

After the Burj, Robert plans to climb some more towers in France, Singapore in Turkey.