Port Kennedy Bone Cave, Limestone cave in Valley Forge National Historical Park, Pennsylvania, US.
Port Kennedy Bone Cave is a limestone cave in Valley Forge, Pennsylvania, containing fossil remains of animals that lived there hundreds of thousands of years ago. The cave sits within a protected park area and is accessible from the surface.
The cave was discovered in 1871 when workers were quarrying limestone in the area. Paleontologists carried out excavations in the 1890s and recovered the fossils before quarrying permanently altered the site.
The fossils found here show animals that roamed this region long before people settled here. Visiting the site gives a sense of how different the local wildlife once was.
The cave is within a protected area, so it is worth checking current access conditions before visiting. Sturdy footwear is a good idea as the ground around the entrance can be uneven.
This single site yielded remains of around forty extinct animal species found together nowhere else. Among them was a ground sloth species known only from the bones recovered here.
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