Crypta magna is seen in:
The medial surface of palatine tonsils is covered by non keratinizing stratified squamous epithelium which dips into the substance of tonsil in the form of crypts. One of these crypts is very large and deep and is called crypta magna or intratonsillar deft.
Nasopharyngeal tonsil
Tubal tonsil
Palatine tonsil
Lingual tonsil