Come see the Dark Side! Your guide will teach you about cave light – or should we say, the lack of it – along the underground trails. Experience the cave in a way not featured on regular tours – by handheld light only. Learn a bit about fluorescence, phosphorescence and triboluminescence along the way. GUIDED TOURS follow paved walkways and pass a stunning array of colorful crystal formations. Guided Cave Tours last about 1 hour. Tickets are non-refundable. Regular admission tickets are for visitors age 13 and up. Child tickets are for visitors age 4 – 12. Children ages 3 and younger are free.