The Hidden St. Marks Cemetery and Harwick Miners Memorial in Cheswick pa. which sits behind a Power Plant

Yes In all the years of traveling thru Cheswick and Springdale and passing the two enormous Power Plants  in the towns I never realized there was a small hidden cemetery , which is also the site of a memorial to the Harwick Coal Mine Disaster

https://usminedisasters.miningquiz.com/saxsewell/harwick.htm

 which prompted
  Andrew Carnegie to start his Heroes Commission  Award  and with in the cemetery  lay some of the Miners Killed that awful day.

https://www.carnegiehero.org/

https://www.youtube.com/watch?v=v6txn6ExeAI

You drive in what looks like the entrance to the plant and go all the way back to the cemetery which is boarded  on two sides by the plant a small creek and the river.

 

You would never suspect it even sits all the way back there

The property also included at one time the Old St Marks Lutheran Church  which is long gone.

http://www.usgwarchives.net/pa/allegheny/tsphotos/stmarkluth-springdale.htm

http://freepages.rootsweb.com/~njm1/genealogy/stmark.htm

As you first approach the cemetery you will notice a plot with a pipe around it this is where the miners who perished in the Harwick disaster are buried. 

The area is heavily security and police  patrolled due to the power plant being all around the cemetery so if you visit be mindful you could be stopped and asked what you are doing back the road.

The Hidden Washboard Falls deep in a ravine in Sharpsburg Pa where you can feel the spirit of Chief Guyasuta

located deep in a 175 acre Ravine in Sharpsburg Pa is  Boy Scout Camp Guyasuta 
it was donated in 1918 to the Boy scouts by one of the Descendants  of James Ohara  for which the town of Ohara gets its name  and the falls them selves have little changed from when the great chief guyasuta and his fellow Native Americans first traveled its path.

http://www.campguyasuta.org/about-us.html

 The camp is open daily to the public and you are welcome to make the aprox. 1 mile hike all the way back to the falls  after checking in with the  Camp Ranger and letting him know you would like to hike up to them. 

But when you do hike up to the very remote area be ready to experience nature like you have never seen it before and experience what it was like when native Americans and chief guyasuta traveled these falls. 

Which obviously got there name wash Board from natural shelf formations

http://d-scholarship.pitt.edu/10839/4/CampGuyasutaGalloway.pdf