Perhaps the Baron's word was considered sufficient deterrent to would-be explorers.
Many of the puzzle clues relate to famous explorers and their missions.
This is an extraordinary extension of research opportunities to young scientists and young explorers.
The trees of Iftcan could easily have remained a secret to explorers, as they had, but surely not this!
Subject to varying definitions, it is of interest mostly to explorers.
These characteristics made the region appealing to explorers who later exploited the locations abundant natural resources.
The Colorado River served as a major barrier to early settlers and explorers of the region.
Known space: The region of the universe known to explorers who communicate with humanity.
The existence of this large lake was known to French explorers for a long time before actually reaching it.
It's sealed off from the public, but is occasionally home to urban explorers and the homeless.