DLR Cologne Visitor Centre is the German Aerospace Center’s appointment-based public gateway at the Linder Höhe research site. Current DLR guidance offers free group tours on published Wednesday–Friday dates, usually at 10:00 or 14:00, lasting about three hours; groups must contain 10–28 visitors aged 16 or over, individuals cannot reserve separately, and English is available on request. Tours introduce the European Astronaut Centre, the joint ESA–DLR LUNA lunar analogue facility, the :envihab aerospace-medicine institute, the Microgravity User Support Center and a high-flux solar-furnace research facility. The large research site is toured on foot, and programmes or dates may change for operational or security reasons. For navigation, DLR advises entering Planitzweg 2, 51147 Cologne, rather than relying only on the Linder Höhe address; confirm current visitor, identity and accessibility guidance before travel.