The site is open at 9am. Excellent tour guides. No fireworks allowed on site, even though sparklers inside the caverns would be awesome. Enjoy your time if you go. [_] cheers [_]
Mercer Caverns is open on July 4th. Open at 9 am, first tour is at 9:30 and the last tour of the day departs at 5 PM. Have a happy and safe 4th of July!
Not sure, they have a website.
Open all the time
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