Like Palmyra, Johnston Atoll is a remote Pacific research station where access is tightly controlled by permits and research schedules. Both require coordination with scientific institutions and offer the same sense of being at the edge of the world in pristine coral environments. The daily rhythm revolves around research activities and the constraints of supply logistics.

Aldabra shares Palmyra's structure as a protected research atoll where visitor access is limited to scientists and pre-approved conservation work. Both require permits, have research station accommodation, and offer immersion in untouched coral ecosystems. Daily life follows research schedules and the rhythm of conservation work rather than typical travel patterns.

Midway operates under similar access constraints as Palmyra, with visits limited to wildlife volunteers and educational groups rather than general tourism. Both require advance permits and offer accommodation in former military facilities converted for conservation work. The experience centers on wildlife observation and participating in ongoing research rather than recreational activities.

Though in a different ocean, Heard Island mirrors Palmyra's model of restricted access for scientific purposes only. Both require permits, operate research stations, and offer complete isolation from normal travel infrastructure. Visitors must commit to extended stays working alongside researchers, with daily routines dictated by scientific objectives and extreme logistics.

Cocos Island shares Palmyra's combination of extreme remoteness and controlled access, though with slightly more flexibility for diving expeditions. Both require multi-day boat journeys to reach and offer accommodation only through ranger stations or research facilities. The experience revolves around marine conservation work and following strict park protocols rather than typical island resort activities.