4. Actun Tunichil Muknal
Deep in the jungles of Belize, Actun Tunichil Muknal; better known as the ATM Cave, pulls you into a world where ancient spirits still seem to whisper through the stone. With glowing skeletons like the “Crystal Maiden” and sacred Mayan artifacts frozen in time, this cave feels more like a temple than a tunnel.
Though its full 5-kilometer depth is known, only a portion is open; leaving the rest cloaked in darkness, mystery, and silence.