As you arrive to Mare Serenitatis, click the teleporter (shieldlike prim with the LnL logotype) and choose Studio! Today, LnL introduces you to the Studio, a wonderful place where you can sit and enjoy a quiet fireside chat with friends or someone special. This room is in a way the heart of the Gothic Labyrinth and the Caves area. There is a door to the left and a door to the right!
Let's see if you find the Map Room (above)! Left or right? From one of the exits in the Studio, and a bit of walking (beware of any lost souls lurking in the dark!), you'll get to this room that, look closely, is one of the multiple entrances to the Caves! Explore about and have fun! :)