Tranquility Base Heritage Site is the landing zone of Apollo 11, the first crewed lunar landing, which took place on 20 July 1969. The site is protected under the Outer Space Heritage Preservation Act of 2041, which established an exclusion boundary around the landing zone and placed the site under joint custodianship of the Lunar Heritage Authority and the Smithsonian Institution. Pelorus Voyages is a licensed excursion operator at the perimeter and provides guided viewing access to GST passengers with the extended Moon Base 7 layover.

Passengers are brought to the marked perimeter by pressurised rover. From the perimeter, the flag, the descent stage of the Eagle lunar module, several scientific instruments, and the astronaut footprint field are visible. The perimeter itself is the closest any visitor may approach; there is no closer access under any circumstances. The Outer Space Heritage Preservation Act carries criminal penalties for entry within the exclusion boundary, and Pelorus Voyages guides are required to report any violation immediately.

The following are prohibited at Tranquility Base Heritage Site and will result in immediate excursion termination and a report to the Lunar Heritage Authority. Entry within the exclusion boundary for any reason, including photograph-related approaches, is prohibited. No surface material — regolith, rocks, or any object from the landing zone — may be collected or removed, including material found outside the exclusion boundary within the broader heritage zone. Flash photography is prohibited within 50 metres of the perimeter flagging. Drone or remotely piloted aircraft of any kind are prohibited within the heritage zone. Pointed laser devices may not be directed at the flag or the descent stage.

Photography from the perimeter is encouraged and the viewing conditions are excellent. The guide will position the rover for optimal angles and can recommend times of the lunar day when the low sun angle produces the best shadowing on the descent stage and footprint field.

The Apollo 14 Fra Mauro landing site, where astronaut Alan Shepard hit the historic golf shots in 1971, is a separate heritage location approximately 180 kilometres from Tranquility Base. It is the site of the Lunar Golf Links and is visited on the golf excursion. The same heritage protection rules apply to the Shepard Shot Marker within the Fra Mauro zone.
