Blauw Jan is a captivating environmental artwork by Hans van Houwelingen, located in the historic Leidseplein area of Amsterdam. Completed in 2021, this installation beautifies an underground bicycle parking area and features 40 bronze lizards, paying homage to a 17th-century pub owner known for keeping exotic animals. The artwork cleverly blends functionality with artistic expression, creating a unique treasure hunt experience for visitors while connecting Amsterdam’s past with its present.