Tinicum Marsh
I've driven by the sign for the John Heinz National Wildlife Refuge at Tinicum many times without stopping (as I was usually headed for a flight at Philadelphia International Airport). I always wondered what was there; luckily my sister wondered too. It was a hot, humid, and sunny day for a wander, but wander we did.
What a gorgeous place! I'm looking forward to returning again - and I'm so glad there were people who fought to preserve this marsh.