Ranger-guided tours are required to enter Jewel Cave, and the various tours are offered at scheduled times, which vary by season. Know Your Limits! All cave tour participants (of all ages) must be able to navigate the tour routes unassisted. Cave tours are moderately strenuous and not recommended for anyone with health conditions, poor balance, mobility concerns, or those with physical limitations (i.e., climbing stairs, recent surgery, and illness). Tickets for the Historic Lantern Tours, Discovery Talks, and some Scenic Tours are available on-site, in person, on a first come, first served basis; advanced reservations are not taken over the phone by park staff. Please be advised that all cave tour tickets are limited by tour type and time, and all tour options often sell out by late morning. During the late spring, summer, and early fall seasons, visitors are encouraged to arrive at the monument in the early morning for the most ticket options available.