Enjoy this 1 hour SELF-GUIDED experience of the 2nd largest immigration station in the U.S., what is now the Detention Barracks Museum. Groups will see inscriptions left by immigrants detained here. What happened at this “Guardian of the Western Gate” is often left out from Ellis Island mainstream history. Large groups must book multiple timeslots and separate into groups of 30 (up to 40 for K-12th school groups). Non-school groups with less than 10 people do not require reservations. Not a guided tour.