explorable
Able to be explored, investigated, or looked through closely.
Explorable describes something you can investigate, examine, or travel through to discover what it contains. A forest with trails is explorable because you can walk through it and see what plants and animals live there. A video game world is explorable when you can wander through different areas, finding hidden treasures or secret passages.
The word suggests possibility and invitation: when something is explorable, it's accessible enough that you can actually investigate it, not just look at it from far away. A museum exhibit becomes truly explorable when you can touch the displays, open drawers, and interact with what's inside, rather than just reading signs behind glass.
Scientists might describe a cave system as explorable once they've found safe ways to enter it. Software developers create explorable websites where users can click through different sections to learn more. In math class, a teacher might present an explorable problem that students can investigate from different angles, trying various approaches to find a solution.
The opposite would be something closed off, dangerous, or impossible to investigate. An explorable space invites curiosity: it practically asks you to discover what secrets or interesting details it holds.