The scene in which Indy shoots the sword-wielding goon was improvised by Harrison Ford. The script called for Indy to get away in a chase scene

The famous monkey salute in Raiders was achieved by dangling grapes from a fishing line just out of frame

R2D2 makes an appearance in Raiders of the Lost Ark on a carving in the Well of the Souls scene

The final setting of "Indiana Jones and the Last Crusade" is a real place. It's a sandstone temple in Petra, Jordan called "Al Khazneh" which dates back to the first century AD

Tom Selleck passed on the role of Indiana Jones in Raiders of the Lost Ark

The scene in which Indy shoots the sword-wielding goon was improvised by Harrison Ford. The script called for Indy to get away in a chase scene