Ban Tham Cave in Son La is the only mountain tunnel road in Northwest Vietnam, offering a thrilling off-road experience through a dark, rocky passage. A must-visit for adventure seekers! Ban Tham Cave ...

Abstract: Multirotors are usually desired to enter confined narrow tunnels that are barely accessible to humans in various applications including inspection, search and rescue, and so on. This task is ...

Deep underground, soldiers faced deadly traps, hidden enemies, and complete darkness—this was the terrifying reality of the Tunnel Rats in Vietnam! Country music star Craig Morgan reenlists in ...