How to find UNCLE's Headquarters
If you want to visit the secret entrance of UNCLE headquarters in New York follow the instructions:
1) Go back to 1964.
2) In Manhattan, find the headquarters of the United Nations (pictured above).
3) Enter in each of the streets "40" and go through their first blocks next to First Avenue (click on the map for details).
4) Look at each of these blocks for a taylor shop called Del Floria's.
5) When you find the Del Floria's, congratulations! You have found the secret entrance to the headquarters of UNCLE.