Been to Helgoland, to the exact spot where Werner Heisenberg discovered Quantum Mechanics. At least the monument suggests that...

Helgoland is a small Island in the middle of the North Sea, until 1890 british, then came to germany as exchange for Sansibar. To get there, you can take the fast ferry from Cuxhaven, taking two and a half hour, right to the port of the island. Or you can take the traditional way from Hamburg with a sixties ship, taking five hours to get close to the port, there change to smaller boats and get transferred to the island.

The island itself is just a big lump of rock in the middle of nowhere, after some terraforming attempts of the british navy in 1945 not entirely flat (5700 tons of explosives were involved...). There is a small village mainly consiting of alcohol and cigarretes shops, as the island is tax free. You can stay exactly three hours on the island before the ship leaves again, which is nearly the time to circle it and buy some stuff (Helgoland is one of the few places where you can get Absolut Vodka with 50% of alcohol, it normally has only 40%...)

It is a really fun trip, you get serious sun burns on the ship, you are on the sea for a day and you can get cheap alcohol. Kind of mini-cruise...