You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: THE U.S. SENATE 
Clue: Generally the Senate ends the day by doing this, rather than adjourning
recessing

Category: ISLAND NATIONS 
Clue: It's where the mambo originated
cuba

Category: WORLD TRAVEL 
Clue: After touring the Old Castle in Gruyeres in this country, you may visit the dairy that makes Gruyere cheese

switzerland