How long is the total length of the collapsed cave, and is there a restroom inside?

One and a half hours, no restroom. There is a restroom after exiting the cave.
Inside the cave, there are no restrooms. The entire trip from entering to exiting takes about 50 minutes. A single path follows through. There are restrooms outside both the entrance and exit. After exiting the cave, you can still continue hiking up the mountain to have fun.
One and a half hours, no bathroom. There’s a bathroom after exiting the cave hole.
Inside the cave, there are no restrooms. It takes about 50 minutes to walk from the entrance to the exit along one route. There are restrooms at both the entry and exit points outside. After exiting, you can still continue hiking up the mountain for fun.