Mira de Aire is a small town about an hour out of Lisbon. Nestled between mountains, it is home to one of Portugal’s 7 Natural Wonders: Grutas de Mira de Aire. Portugal has tons of underground caves, most are open to the public,  accompanied by a guide, some even have halls inside to host events – like the caves of Mira de Aire! Yes you read that correctly there is a HALL that you can