Chassaignac's tubercle lies at level of
The anterior tubercle of the transverse process of the sixth cervical veebra is the largest of all such processes and is called the carotid tubercle (of Chassaignac). The common carotid aery can be best pressed against I this tubercle, deep to the anterior border of the I sternocleidomastoid muscle. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 6th edition pg 300
Erb's point
Stellate ganglion
Atlas
Odontoid process
Head and neck