A Super Secret Room (Cellar) in the Binding of Isaac: Rebirth (BOIR). This room contains one Trinket, in this case a Cursed Skull

The Super Secret Room is a type of Room in The Binding of Isaac: Rebirth (TBOIR)

It is found near one other room (not a special room like shop or boss room).

The door can be opened using the following items:

The room can be seen on the map using the following items:

There are several types of Super Secret Rooms each with different items inside: