I am confused in how deep I been mining. So far no natural tunnels or anything. Outside is level 418. When I am underground that number is all over the place. When I step in the tunnel I have dug, the level goes up to 527. Near the end of my tunnel is level 490, depth 191. When I climb up and go up in the tunnel. Level goes up but depth jumps to 218. Trying to find ores and any underground forts like in the java version. Plus like to see what spiders and lava wolves look like. Look like a gentle slope to going down in my tunnel in parts.
If You open the Console and type "coordinates" (without the quotes) Your current coordinates will be displayed, if i remember correctly the second number is Your depth with 0 being "Sea level".