Nature Grotto

Deep within the Mort Myre Swamp, the Nature Grotto is hidden in a tree that is only unlockable during and after the Nature Spirit quest. The tree itself is in the middle of a small island, which can be accessed by jumping across the broken bridge south of the island. Filliman Tarlock is found here.

Altar of nature
One of only six altars in RuneScape that boost players' Prayer points above the maximum level (one is located in the Monastery, northeast of Falador; another is located in Oo'glog and the third in the pyramid near Uzer, at the statue of Amascut, although this altar will do some damage to your life points by using it. With the quest The Temple at Senntisten you gain access to the Altar of Zaros which provides a 15% boost to the player's Prayer level. The altar in Seers' Village also gives the player a small boost if they have completed all of the Seers' Village Tasks). Players may also bless their silver sickles here.

Summoning obelisk
The Nature Grotto is one of many places where players can recharge their Summoning points. Along with this, there is a Summoning shop, which is known as the wishing well. This is also the location of one of the few large Summoning obelisks in RuneScape. The well contains the same items as other Summoning shops, even though there is no apparent shopkeeper running the shop.

Trivia

 * Around every 5 minutes a green glow surrounds you followed by the message: "The aura of Filliman's camp protects you from the swamp."
 * It is revealed in Burgh De Rott Ramble/Temple Trekking that the grotto itself used to be surrounded by swamp plants until "the evil" (possibly ghasts or shades as mentioned by the spirit during a dialogue with him) set fire to a plant(s) and it spread to nearly every other one; the player had to extinguish them.
 * The Nature Grotto may be a reference to Yoda's hut from the Star Wars trilogy. Both were small, made from dirt, tree based, in a swamp filled with dangerous creatures and inhabited by a green being.

Nature Grotto