Crystal Grottoes Caverns
19821 Shepherdstown Pike
+1 240 217-7623
Adults $15, children $10. Cash only
Apr-Oct: 10AM-5PM daily, Nov-March: Sa-Su 11AM-4PM
A relatively small, but nonetheless really spectacular, with reputedly more formations per square foot than any other cave in the world. Open to the public as a public show cave under the same family ownership for 80 years, after being spared for its great beauty destruction at the hands of the quarry.
Washington Monument
6620 Zittlestown Rd, Middletown
+1 301 791-4767
$2-3/vehicle
Sunrise-sunset daily
Go east of Boonsboro for four miles on MD-40 Alternate to the top of South Mountain. Turn left on Washington Monument Rd
On 24 July 1827, the patriotic citizens beat both Baltimore and latecomer Washington, D.C. to the punch in erecting the nation's first Washington Monument. The monument is not in the town itself, but rather just outside on top of South Mountain. There is a museum on-site, open May-Sep daily and weekends only in April and October closed winter.