There are huge slumps of land down into the Halema'uma'u crater in the Kilauea caldera.
A recent visit to the parking are shows massive cracking. I parked there in the early 90's during a visit with Mrs. CW. She told me then the place gave her the creeps and we needed to get out, and she was right.
You can see the parking area on the left of the crater in this video.