Sri Govinda Kunda, in Govardhan.
pratah kale prabhu 'manasa-ganga'ya kari' snana
govardhana parikramaya karila prayana
In the morning, Sri Chaitanya Mahaprabhu took His bath in a lake called Manasa-ganga. He then circumambulated Govardhan Hill.
govardhana dekhi' prabhu premavista hana
nachite nachite chalila sloka padiya
Just by seeing Govardhan Hill, Sri Chaitanya Mahaprabhu became ecstatic with love of Krishna. While dancing and dancing, He recited the following verse.
hantayam adrir abala hari dasa-varyo
yad rama krsna charana sparasa pramodah
manam tanoti saha go ganayos tayor yat
paniya suyavasa kandara kanda mulaih
"Of all the devotees, this Govardhan Hill is the best! O My friends, this hill supplies Krishna and Balaram, as well as Their calves, cows and cowherd friends, with all kinds of necessities - water for drinking, very soft grass, caves, fruits, flowers and vegetables. In this way the hill offers respect to the Lord. Being touched by the lotus feet of Krishna and Balaram, Govardhan Hill appears very jubilant."
'govinda kundadi tirthe prabhu kaila snana
tahan sunila -- gopala gela ganthuli grama
Sri Chaitanya Mahaprabhu then took His bath in a lake called Govinda-kunda....
Chaitanya Charitamrta, Madhya, 18.33-35
As far as I have been taught, the activities of the Supreme Personality of Godhead are infinite. Seeing as they have no beginning or end it is difficult to find a place to stop describing them. I stop here solely because there is a beautiful excerpt in which Srila Sridhar Maharaj has disscussed Govardhan Hill in the book The Loving Search for the Lost Servants:
deve varsati yajna-viplavarusa vajrasma
sidat pala pasu striyatma saranam drstvanukampy utsmayam
utpatyaika-karena sailamavalo lilocchilindhram yatha
bibrad gosthamapan mahendram adabhit priyan na indro gavam
The very gist of the Govardhan lila, the very
substance of the Pastime, is represented in this verse.
...Nanda Maharaj prays in this verse, "May that lord of the cows be satisfied by us. Who is Indra when compared to Krishna? Krishna is the master of Indra. And yet He has appeared as the master of cows; the Supreme Absolute Truth has accepted a simple position as the keeper of cows. Superficially, He is a mere cowherd boy. But let that cowherd boy, who holds within Him the power of controlling the whole universe, be satisfied with us. We want to worship that Lord who has taken the humble position of the king of the cows."
From this verse of Srimad-Bhagavatam, we can understand the position of the Lord's Pastime at Govardhan. It is also described here that when the Brajabasis worshipped Him and engaged in sacrifice for His satisfaction, they saw Govardhan Hill as the Supreme Person, extending His hands, accepting the things offered to Him, and feeding Himself.
At that time, Krishna pointed out, "You see! You thought that Govardhan Hill was only a heap of stone. No - it is living, it is the Supreme Personality of Godhead." At that time, Krishna revealed Himself as Govardhan Hill and showed how it is also His extended self. According to authorities in our line, Radha-kunda is the extended self of Srimati Radharani and Govardhan is the extended self of Krishna. And so we worship a stone from Govardhan Hill, a part of Giridhari, as Krishna Himself. We may understand from this that a part of the infinite is infinite.
...The Govardhan-sila represents Krishna as the master and keeper of cows. Within Govardhan is that mild and soft conception of God the Beautiful. We beg for His mercy, His affection, and His gracious glance upon us.