I had to look up "spelunking". Seems there is some snobbery involved with that term. wink

Since spelunking and caving generally seems to refer to exploring natural caves, I guess we weren't spelunking.

Not sure what exploring man-made tunnels is called. ...Tunneling? But that implies boring a tunnel.

No sir, officer, I just fell into that hole accident'ly!

Now THIS might be spelunking. But then... it is a lava tube, and it is named "Dry Tunnel". So, were we tubing or tunneling, or what? laugh