1. An area or region that is enigmatic, puzzling, or difficult to understand; a place shrouded in mystery or secrecy
The deep ocean remains a mysterious zone for marine biologists.
O fundo do oceano continua sendo uma zona misteriosa para os biólogos marinhos.
2. A territory or space marked by unknown or unexplained phenomena
That abandoned building is considered a mysterious zone by locals.
Aquele edifício abandonado é considerado uma zona misteriosa pelos moradores locais.