Madhuvana is a garden described in the Ramayana and it was very dear to Sugriva (the king of Kishkindha), who along with his Vanara army including Hanuman had helped in Bhagavan Sri Rama in rescuing Mata Sita.
The protection of Madhuvana was assigned to Dadhimukha, uncle of Sugriva. The garden was sarvabhuta manoharam (an eye pleaser for everyone). It was rich with honey, fruits, flowers and other delicious vegetations, and was used by the royal family.
One day the garden was raided by monkeys, ecstatic after learning about the location of Mata Sita in Lanka as reported by Hanuman. Under normal circumstances, any trespasser into this vana was subjected to a death sentence by Sugriva. But Sugriva pardoned the atrocity committed by the southward group of monkeys, who had gone in search of Sita. He simply received the complaint of destruction of Madhuvana. He thought that this was indicative of the successful trip of the team. The destruction of the Madhuvana is very pictorially described in the Ramayana.
There was almost a war between the intruding monkeys, who were enjoying themselves after getting the news of Sita, and Dadhimukha. The gardener, Dadhimukha, was even manhandled by the incorrigible vanarasena (army of monkeys). He explains the King Sugriva his inability to protect Madhuvana from the onslaught of Angada, Hanuman and their party. This is reported to Rama, Lakshmana and Sugriva by Dadhimukha. It was an ingenious way of conveying the good news to the king. This narration is taken as a good sign of a successful emissarial function of the team and Sugriva ecstatically shares the news with Bhagavan Sri Rama. Sugriva felt the monkeys would not have dared to destroy such a prohibited area unless they had a valid reason to do so. He pardoned them, keeping in view their success. Madhuvana is known for its rich vegetation, strict vigil of Dadhimukha and personal attention of Sugriva.