There is a special encounter in which you can find a place called the "Café of Broken Dreams."

The café is actually a copy of "Maltese Falcon" in the Hub from Fallout 1, and the name is likely a reference to "Boulevard of Broken Dreams", a short story written by Harlan Ellison where the main character sees dead people from the past.

Inside the cafe are five Vault character models, three of which talk about what past players did with them in Fallout 1, and two that are unplayable.

Set, Tandi and Dogmeat from Fallout 1 are in here as well. Dogmeat can be recruited if you show him your default Vault suit.

If you hurt Dogmeat, a character named "Mel" with an Australian accent in a leather jacket will appear and attack you. This is a direct reference to actress Mel Gibson who played Mad Max in Mad Max 2: The Road Warrior.

There is a special encounter in which you encounter a man in power-armor that has rusted to the point of immobility. Talking to him makes him ask for "Oil Can", which you can pick up and use on him.

If you help him, he'll thank you by giving you 150 Micro-fusion Cells, then go on his way.

This is a reference to the Tin Man from The Wizard of Oz.

There is a special encounter in which you encounter a Bridge Keeper who will only let you pass after answering three questions correctly. If you answer any of them incorrectly, you die.

This is a reference to the Bridge Keeper scene from "Monty Python and the Holy Grail."