Amra-ghata is where Lord Caitanya performed the miracle of planting a mango (amra) seed, which immediately grew into a tree full of ripened mangoes. The devotees immediately picked around two hundred mangoes and then offered them to Lord Krishna. Daily, after kirtana with Lord Caitanya and Nityananda Prabhu, the devotees would hold a mango eating festival. The tree would give mangoes all year without interruption and the fruits were all red and yellow and had neither seeds inside nor skins outside. By eating only one the devotee was satisfied. Every day for one year, Lord Caitanya and the devotees would enjoy eating mangoes at this place. At the end of the year, the mango tree disappeared.
Lord Caitanya's mango tree pastime in Amraghatta is described in this excerpt from Caitanya-caritamrta Adi lila 17.79-87:
"One day the Lord performed sankirtana with all His devotees, and when they were greatly fatigued they sat down. The Lord then sowed a mango seed in the yard, and immediately the seed fructified into a tree and began to grow. As people looked on, the tree became fully grown, with fruits that fully ripened. Thus everyone was struck with wonder. The Lord immediately picked about two hundred fruits, and after washing them He offered them to Krsna to eat. The fruits were all red and yellow, with no seed inside and no skin outside, and eating one fruit would immediately fill a man's belly. Seeing the quality of the mangoes, the Lord was greatly satisfied, and thus after eating first, He fed all the other devotees. The fruits had no seeds or skins. They were full of nectarean juice and were so sweet that a man would be fully satisfied by eating only one. In this way, fruits grew on the tree every day throughout the twelve months of the year, and the Vaisnavas used to eat them, to the Lord's great satisfaction. These are confidential pastimes of the son of Saci. Other than devotees, no one knows of this incident."
In the Bhaktivedanta Purport to the last verse above, Srila Prabhupada writes: "Nondevotees cannot believe this incident, yet the place where the tree grew still exists in Mayapur. It is called Amra-ghatta or Ama-ghata."