From Snake Island to North Sentinel Island; 10 mysterious places around the world travellers can never visit

In our hyper-connected era, where jumping on a flight to almost anywhere is not a big deal, it's tempting to think the whole globe is fully accessible. Yet, dotted around the planet are specific zones that remain strictly out of reach. Some are heavily guarded by military personnel or cloaked in government secrecy, while others are barricaded to shield vulnerable ecosystems, ancient traditions, or quite literally, to save lives.