Enjoy the beautiful stalactite and stalagmite formations of Crystal Grottoes Caverns, located in Boonsboro, MD, just over an hour from Eldersburg. With 2 adult tickets and 2 children's tickets, you'll be able to enjoy the caverns as a day trip. Or consider bidding on the 1 Night Stay at the Bavarian Inn in Shepherdstown, WV to make it an overnight. Shepherdstown is approximately 15 minutes from the Caverns.