"Ropes course sounds fun. Unless you have a really big adult sized playground."

"Of course I do."

"Then the playground!"

Addy and Libby exchange a smile. Then she teleports River and herself. They land on a platform built around a tree with limbs high above them. Rope bridges stretch off in four directions. There's also a fire pole and a climbing wall, each covering the ten meters to the ground below. The first of the bridges leads to a collection of platforms built in and around a grove of trees some of which are improbably thick. Branches and leaves are deliberately placed giving the area a fae feeling. The second bridge leads into a cliff face. Small windows are visible dotted above and below giving views into somewhat cramped tunnels and more generous cozy rooms. The third bridge leads to a massive wooden castle with towers, more rope bridges and platforms oriented at a variety of heights so you can climb either the inside or the outside. The fourth bridge leads into a massive array of ropes and and nets with platforms suspended here and there. You can climb directly from anywhere in the net to anywhere else.

She heads over to the cliff face.

Addy follows. At the end of the rope bridge there's a small sitting room with beanbag chairs and a thick carpet that climbs the walls with a fractal rainbow pattern. There's branching off from there there's one tunnel tall enough to walk upright through, another couple that you can crouch in and several more that require crawling, at least for an adult. The crouching and crawling tunnels all have a foam covering to make it more comfortable.

She explores one of the crouching tunnels.

The floor, walls and ceiling are all covered by a squishy material so it doesn't hurt if you accidentally bump your head, soft light comes through the ceiling. The tunnel is part of a three dimensional maze. There's a line with arrows pointing back to the entrance on the the floor. The initial pathway leads to another small room with more tunnels sloping up and down and in several directions, both towards the cliff-face and deeper into the mountain.

She keeps exploring, deeper into the mountain.

There's a lot to explore, if she keeps going downward she'll eventually find one of the pools of water with racks of masks next to it. There's underwater passages leading out from the pool.

Oooo.

Time for a swim, then!

The mask allows the user to breathe underwater, though if River wants she could probably manage without it. The underwater passages lead to a coral reef lit by bioluminescent coral and animals.

She tests out making herself able to breathe underwater, first, then see perfectly even with the water in her eyes -

The reef is beautiful.

Some of the fish are braver than others and rub up against her if she lets them. There are of course more passageways, some obvious and some hidden.

She lets them! This is delightful!

She explores the more hidden passageways.

This particular passage was concealed behind a bit of kelp. It leads to a small above water chamber with several portals in it. One portal leads a woven cocoon of a room probably something hidden in the net of ropes. Another leads to a wooden room with several funhouse mirrors, perhaps it's in the castle. The third leads to a treehouse that appears to literally be built inside a tree with branches growing into it to form furniture. The fourth and final portal leads to a room with a transparent balcony that protrudes from the cliff-face.

She heads into the transparent balcony, looking around.

There's an almost perfectly transparent substance that forms the floor and the railings so you can look in all directions. The cliff face is a red tinted rock and one segment looks pretty climbable. Back inside of the room with the portal there's also a few tunnels leading back into the depths of the mountain.

She spends a good while resting, just looking around, then starts climbing.

The climb starts off easy but gets steadily harder hand and foot holds getting further apart, towards the end she might need to jump from one hold to another. The full wall is about ten meters. If there are any safety measures they aren't obvious.

She wants to be able to jump that well, can imagine herself being practically super human as she climbs.

Well then she can do it, maybe not on her first try though. If she falls a small bubble surrounds her and deposits her gently at the bottom of the wall where she can begin again.

The bubble is fun.

She keeps trying until she gets it.

When she reaches the top she'll find a nice garden with some trees, several flowerbeds and a small pool of water. This one doesn't have any secret passages. The grass here is unusually soft and springy.

She looks around, then flops on the very soft grass, giggling.