A mountain outside, a sky inside. From the outside, it looks like an ordinary mountain, but inside it is a huge natural cave.

The place where they came down was the core area of the entire cave. It is made up of a sky cave on the top and another cave. Since it was located in the huge stone wall, it was relatively high, and it was completely made of hedrons, which could reflect the sunlight shining through the gaps, and it was quite bright inside. The air is also relatively fresh and the environment is quiet. The stalactites of different forms in the cave are dazzling and gorgeous: the new bamboo shoots in the bamboo forest after the rain, the aventurine melon garden to be ripe, the majestic forest and sea snow field, the wild pasture with thousands of horses galloping, the magnificent epic war, and the scattered pavilions in the air, almost everything; The herdsmen who herd cattle and horses, the fishermen who fish in the cold river, the farmers who plough the fields, the woodcutters who return from collecting firewood, the small traders who push the carts, and the singers who sing and dance are also lifelike and vivid. The crystal clear stone flowers, stone fruits, stone trees, stone gardens, stone forests, stone villains and stone huts have built a fairytale-like world. It makes people want to blow fairy breath and make it all come alive.

This cave is divided into four layers: upper, middle, lower, and dark caves, with a total of nine large caves and twenty-four small caves. The big one is flat and open, and the small one is elegant and beautiful.

A pavilion-like place in the big cave is the most ornamental place. The stalactites inside have different shapes, like a gathering of immortals: the Jade Emperor wearing a crown of flat heaven, the Taishang Laojun holding the dust, the three heads and six arms of the three princes of Nezha, the Antarctic immortal Weng riding a deer, and the Sakyamuni who preaches the scriptures and the five hundred arhats who listen to the Dharma, the four great bodhisattvas and so on. In another cave, it was a different scene. The ugly-faced Ten Halls of Hades, the ghost judge with a leopard's head and eyes, the little ghost with teeth and claws, and the sinners in the sea of swords and fires constitute a purgatory scene, which is terrifying.

Adjacent to this cave is a corridor cave. The hole just now went from the top down, and the hole went from the bottom up. Step by step, there is a great potential to ascend to the sky. This cave is unfathomable, twisting and winding, like a coiled serpent, devouring oncoming people.

Walk through this snake path and walk another kilometer or so. A huge cave of about ten kilometers or so appeared in front of people's eyes. The road inside the cave is winding, and there are three halls that can accommodate four or five hundred people. In each hall, there is a huge stone pillar with a fountain gushing out from the top of the column, which looks very spectacular.

Walking through these halls, a fresh breath comes to your face. The nose is fruity, floral, and moist. The roads here are intricate, like the meridians on the human body, and like overlapping cobwebs. Those who have not walked will not be able to find a way out at all. Hu Bingqing also lingered for a long time at the intersection of each road before she walked out with the mark that Nam Taehyun told her.

It's a little dark along the way, and there are occasional grandiose moments, but it's not fascinating. Along the way, there was not a trace of wind until they reached another cave.

There is a gentle breeze here, and you can feel them flowing when you reach out your hand. This also makes the dull environment more refreshing, so that people can't help but feel shocked and forget the fatigue on their bodies.

Walking this way, there is an irregular hall. The scale of this hall is beyond imagination, and with the current light, there is no edge to be seen. The stalactites on the roof of the cave and the four walls of the cave build a variety of wonderful scenes. Some are like apes hanging from trees, some are like cranes combing their feathers, some are like tigers turning back, and some are like giant pythons coming out of the clouds, with different forms and vividness. There is a deep pool on the side of the cave, and the water of the pool is clear and can shine on people.

After passing the hall, they were greeted by a spectacular idyllic scene. The emulsion dripping from the roof of the cave condensed into patches of farmland on the floor. There are barren dry fields, there are paddy fields overflowing with water, there are pagoda fields that are heavily clustered together, and there are terraced fields with rings and rings, and the field stalks are staggered and horizontal. There was cotton, and rice, and wheat, and corn in the fields.

From these stone fields to the right down, you come to a big cave entrance, stand at the entrance of the cave and look out, only to see the water to the clouds, the clouds to the sky, the water and the sky are the same color, the sea of fog is a piece of misty, ethereal like a fairyland. Entering the cave, sixteen tall stone pillars are neatly arranged together, like heavenly pillars supporting the heavenly court, making the scenery in the cave more brilliant and magnificent.

From here, there is a small hole on the left, which can only accommodate a dozen people. The cave is the same size from east to west, north and south, and the walls are smooth, as if they had been dug by hand and then carefully polished, but it was naturally formed.

In the opposite direction is a long, narrow tunnel. The tunnel is narrow enough to accommodate two people in parallel. At the end of the tunnel, there is still a small opening, and after entering, there is a circular hall. There are countless caves around the hall. These caves, in terms of shape, area and composition, are basically the same, making it difficult to distinguish clearly. Without markings, it is simply impossible to get out.

After these labyrinths, you will come to a wide body of water. This is the underground river of the cave. Hu Bingqing ordered the servants to take out the prepared cowhide raft and put it into the water, and then put the items they were carrying on the raft, and everyone sat on it one after another, followed the current, and slowly rowed down.

At the end of the river, it suddenly opened up. A botanical garden on a grand scale appeared before their eyes. Its soil composition is mainly brick red soil and red soil with ashing phenomenon. There are many kinds of plants in the forest, among which the trees have a multi-layered structure; The upper layer of the tree is more than 30 meters high, mostly evergreen trees and deciduous broad-leaved trees, the bark color is light, thin and smooth, the base of the tree often has plate-like roots, and flower branches can grow on the old stem.

Large woody vines and epiphytes are particularly developed, with some mosses and lichens epiphytic on the foliar surface, and woody ferns and large-leaved herbs in the understory. Trees in the rainforest are mostly dicots with thick leathery leaves and shallow root systems.

The subcanopy is composed of small trees, lianas and epiphytes such as orchids, bromeliads and ferns, some of which are epiphytic and entwined around parasitic trunks, while others rely only on trees as supports. The surface of the ground is covered with branches and fallen leaves.

Woody lianas can be found everywhere, some up to 20 or 30 centimeters thick and up to several hundred meters long, they climb along the trunk and branches, from one tree to another, from the bottom of the tree to the top of the tree, and from the top of the tree to hang upside down, intertwined, like a dense net. Epiphytes such as algae, mosses, lichens, ferns and orchids attach themselves to the trunks and branches of trees, shrubs or vines, as if they were covered with a thick green coat, and some also bloom with all kinds of gorgeous flowers, and some even epiphytes on the leaves, forming a wonderful scenery of "trees on trees" and "grass on leaves".

Some species often develop multi-faceted tabular roots at the base of the trunk, which protrude two to three meters from the base of the trunk and extend downward in a radial pattern. Some of them have many well-developed aerial roots, which hang down from the trunk of the tree, and after being rooted in the soil, they continue to thicken, forming a lot of "trunks", and the momentum of a forest of trees is very spectacular. Some species of trees can also flower and bear fruit at the trunk or root neck of old trees, which is unique to tropical rainforests.

Wangtian tree, wild plantain and bamboo forest, thousands of miles of olive kernel, longan; large medicine tree, dragon fruit, self-beauty tree; Burmese lacquer, mountain white orchid. Four servals, dracaena. Panzhihua, Yinghua Forest, High Banyan Tree, Jujube Forest and Salicylus Forest. Shellaceae, Lauraceae, Camelliaceae, Magnoliaceae, etc., many plants that should not appear here, have also appeared.

This stunned everyone, and they wanted to rush in immediately and explore. What makes them even more incredible is that the location of this botanical garden is not a small basin surrounded by mountains, but at the bottom of a sinkhole. That's why the sun is scorching here when it's still icy and snowy outside.

"The world is so big that there are no wonders". Ba Niu couldn't help but sigh sincerely: "The cave just now has opened my eyes, I didn't expect to see such an incredible scene."

"I didn't expect it either", Hu Bingqing was also immersed in an excitement inspired by curiosity: "When my father gave me the map, I thought it was just a big stone cave, but I didn't expect it to be a cave."

Ba Niu took the picture from her hand, studied it carefully, and shook his head: "If you don't see it with your own eyes, you really can't see it just by looking at the picture."

The two men sighed and set up their tents at the edge of the woods, they needed to rest for the night before deciding on the course of tomorrow.