Flexor retinaculum - arches anteriorly over the carpals, covering the carpal tunnel.

Ulnar canal (Guyon's canal) - medial & volar aspect of the hand, superficial to the flexor retinaculum

Snuffbox - on the radial aspect of the dorsum of the hand, at the base of the thumb. Contains the scaphoid and trapezium. Snuffbox tenderness is characteristic of scaphoid fracture.