Lightbulb jokes are universal, only the target changes. The Bavarians have some long-form jokes ("Two Austrians go on vacation to the Sahara...") that I'd never heard before going to Germany.

In case anyone is wondering, the joke (actually) goes:

Two Bavarians go on vacation to the Sahara and quickly find themselves bored. Being German, they decide to do something constructive, and decide to build a bridge from whatever scrap wood they can find. Two weeks pass in happy industry, but as they're flying home, the first slaps his head and says, "We have to go back!" "Why," asks the second. "Because we signed our names on it, and if anyone finds we built a bridge in the desert, we'll never hear the end of it!" says the first.

So they switch planes and head back. As they near the bridge, the first says: "Stay here, and I'll go check the coast is clear," and he heads off over the dunes. A while later, he returns, crestfallen. "We are undone," he cries, "a couple of Austrians found our bridge already!" "What are they doing," asks the second. The first answers:
"Fishing off it."