Malaysian iced tea
When I was in the SF bay area, I was fond of a drink known as Malaysian Iced Tea, which was similar to the Thai version. Naturally, when I came to Malaysia, I began looking around for it. To my great bewilderment, nobody seemed to serve it! I started to suspect that perhaps it was one of those recipes that was actually invented in the US (presumably by Malaysia immigrants) and didn't really exist in Malaysia. This was a disappointing hypothesis because I had been eagerly looking forward to having some while here.
Today, however, I discovered that it does exist and is known locally as teh c peng or 3 layer tea. And the reason I had so much trouble finding it is that it's from East Malaysia (on the island of Borneo) while I've been in West Malaysia (on the peninsula South of Thailand).