BLUB Berlin (Berliner Luft- und Badeparadies) was a large indoor water park located in the Neukölln district of Berlin. Opened in 1985, it featured water slides, pools, saunas, and a tropical-themed interior. It quickly became a favorite leisure destination for families and tourists.

BLUB was forced to close in 2005 due to hygiene concerns and financial difficulties. The site remained abandoned for years, attracting graffiti artists, vandals, and urban explorers. It became one of Berlin’s most iconic abandoned places until demolition began in the late 2010s.