Mrs. Perryzip and I found this one together - this was our 1800th find. 

AT Pen Mar

This one is a "must-do" - you're gonna hike right past/down it. Be sure to check it out!

Cove Mountain

Very cool offset cache - easily reached from The Darlington Shelter. The vista is incredible. I recommend it for after breakfast before heading to Duncannon/Boiling Springs.

Cumberland Valley Vista

Nice cache to do when camped at the Tom's Run Shelter. Go refill your water and sneak off and find this cache.
(NOTE: I skipped the nearby Camp Michaeux Nostalgia due to time constraints, but you'll hike right by that one here too.)

Good Dog Abby

Mrs. Perryzip and I found this one together before she kicked me down the trail.

Inspiration Peak

Easily reached from the AT. Step 1 - drop your pack. Step 2 - find the cache. Step 3 - enjoy the view. BE SURE NOT TO SKIP STEP 1! ;-)

TAKE A HIKE!™~Hawk Rock

This one required a little backtracking off the AT. Had I known the road paralleled the trail it would have been easier. 
(NOTE: Due to the time spent backtracking I skipped the nearby Hairy Springs, but that one's just down the hill from you as well.)  

YOUNG ADVENTURERS(1)

I found these caches while backpacking on the AT from Pen Mar to Peter's Mountain. These caches were easily accessible from the trail. Some others were too, but we had already found them or I skipped them to be able meet constraints while hiking.

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PenMar to Peter's Mountain HikePublic