I did a search and was surprised that nobody in this thread has mentioned "Club Cool" (formerly "Ice Station Cool") at Walt Disney World. This is an attraction inside EPCOT Center (in Orlando), sponsored by Coca-Cola, that features a bunch of Coke brands from around the world. Free sample-size soda, and serve yourself!

Some of the flavors offered, according to Wikipedia:

Smart Watermelon (China) - A very refreshing watermelon flavored drink
Kinley Lemon (Israel)
Fanta Kolita (Costa Rica) - A very sweet cherry flavored soda
VegitaBeta (Japan)
Lift Apple (Mexico) - An apple flavored beverage
Mezzo Mix (Germany) - Coca Cola with a taste of orange
Beverly (Italy) - A very bitter non-alcoholic apéritif
Krest Ginger Ale (Mozambique)