South of Flotsam - Romance Peak

I just started playing the game and noticed that on the map of Flotsam, there's a location indicated with two lovers; a little mountain peak in the South of the area. When you reach the summit, there's a winding patch that leads under an overhang that ends in a stone wall. I can take this wall down with Aard, but how do I descend down to the big cavern below? This area has a hot spot in it that shows that I can interact with it, and I tried carrying a rope ladder to this area, but no luck. Any help would be greatly appreciated! Thanks!

The game will take you there at a later stage depending on some choices you make regarding a certain npc…

Actually you will get there sooner or later. The number of times and the quality of company may differ though

Thanks for the reply without dropping a spoiler!

It is highly recommended that you take this certain npc there

Yip, and once you are in that cavern, do indicate that you'd like to tarry there awhile..