The Morgue is located in the Office of the Medical Examiner in New York City. Medical Examiners who work in the morgue include Dr. Eugene Hawes and Dr. Grannis. Sherlock Holmes has a standing agreement with Dr. Hawes in which they play chess and if Holmes wins, he's allowed to examine the cadavers. Its first appearance is in the Season Two episode "Ancient History".
The morgue consists of a ramp, examination tables, body cooler chambers, several offices and an elevator. In February 2016, a bomb was placed in a murder victim's stomach which exploded in the body coolers, killing OCME staffer Nicky Slater and injuring Dr. Hawes. ("Down Where the Dead Delight")
Watson's first time in the morgue.
Holmes, Watson, Bell and Hawes.
Hawes and Nicky Slater.
The motto above the elevator in the morgue is "Taceant colloquia, effugiat risus. Hic locus est ubi mors gaudet succurrere vitae" which translates to Let idle talk be silenced, let laughter be banished. This is a place where death rejoices to teach those that live.