Onondaga Cave, a National Natural Landmark within Onondaga Cave State Park, is recognized as one of the most spectacular caves in the nation because of the quality of its formations. The tours lasts about an hour and fifteen minutes, covering about one mile of passageways. The cave's temperature is 57ºF (13ºC) year-round. Scheduled tours are given seasonally; check website for dates. Cave tour prices: $15; ages 6-12, $9; younger than 6, free. Group rates are offered for 10 or more people. Group reservations must be made at least two weeks in advance in order to receive the group, however, group reservations can be made up to seven months in advance.