Camphor Tree is where Taiju was about to confess to Yuzuriha. This is also where he found her chapter 1 p35 after his petrification in the Stone World. This tree existed during the Pre-Petrification World.
This is where he confessed his love for Yuzuriha. chapter 1 p35-37
Senku craved "Head down the river, you great big oaf." chapter 1 p38-40