1. Land that has no visible boundaries, markers, or official demarcation indicating ownership, property lines, or designated use
The hikers ventured into unmarked land beyond the national park boundaries.
Os caminhantes se aventuraram em terra sem demarcação além dos limites do parque nacional.
2. Territory that has not been officially surveyed, mapped, or claimed by any government or individual
Much of the Amazon rainforest remains unmarked land with indigenous communities inhabiting it.
Grande parte da floresta amazônica permanece como terra sem demarcação com comunidades indígenas habitando-a.