Lunar Orbit and Landing Approach
Project LOLA, or Lunar Orbit and Landing Approach, was a simulator built at the NASA's Langley Research Center to study landing on the lunar surface. Built to aid the Apollo astronauts, it aimed to provide a detailed visual encounter with the Moon's landscape, costing nearly $2 million.
Source: Wikipedia — Lunar Orbit and Landing Approach (CC BY-SA 4.0)