He was visiting the Cave of the Marbles, a cave system in southeastern Mexico that measures 1,730 feet [529 m] in length and 56 feet [17 m] in depth.
Ia sedang berkunjung ke Gua Kelereng, suatu rangkaian gua di Meksiko sebelah tenggara yang panjangnya 529 meter dan kedalamannya 17 meter.