Self-guided visit.150 free tickets will be distributed beginning at 10 a.m. in numbered groups of 10. Groups will take the tour in order of their group number from 10 a.m.–12:30 p.m. Each tour will take approximately 10 minutes to ascend, take in the beautiful views, and descend. This is a hands free experience – each person must be able to navigate many steep steps and a ladder on his/her own.