The two traditional possible locations for the transfiguration are Mt. Hermon and Mt. Tabor. Look at the map below to get a feel of their locations relative to the Sea of Galilee.
Traditional Locations of The Transfiguration - Bible History Online
Mt. Tabor
View of Mt. Tabor from Nazareth
View of Mount Tabor (Left) and Jezreel Valley (Right) from Nazareth
Mt. Hermon
Rare View of Mt. Hermon from the Sea of Galilee - Exploring Bible Lands