Krsna killed the asura named Lohavasura.
The Bhagavatam says that Krsna returned to Vrndavana after killing Lohavasura and Dantavakra.
In the time of Krsna this place was beautiful, the Yamuna flowed through here and the gopis also came.
Funny lila of Krsna acting as a boatman and crossing the Yamuna by rocking the boat with the gopis inside.
Krsna performs divine pastimes on an island that emerges from nowhere in the middle of the Yamuna.
Gopinatha, what a beautiful song!