2011 – when Alain Robert, famously known as the French Spider-Man, turned the gleaming glass and steel surface of the world's tallest tower – the Burj Khalifa – into a vertical climbing wall.

Alain Robert is nicknamed “the French Spider ... He has also climbed Burj Khalifa's 828 metres and Cayan Tower, Dubai Marina's 307-metre twisting building, in 70 minutes. These days he continues ...