The largest US air base outside the United States is located in Ramstein, Rhineland-Palatinate . This state in southwestern Germany is also the ancestral home of US President Donald Trump . It's home to the world's tallest cold-water geyser, which shoots up 60 meters (about 200 feet), and, of course, there's the wine . Nearly three-quarters of Germany's wine production comes from the regions along the Rhine, Moselle, Nahe and Ahr rivers. So it's no coincidence that Mainz, the capital of Rhineland‑Palatinate, hosts the country's only ministry explicitly responsible for viticulture. The portfolio is held by the neoliberal Free Democrats (FDP), who govern the state together with the center-left Social Democrats (SPD) and the ecologist Greens . Since 2016, this coalition has formed Germany's last remaining "traffic‑light" government — named after the parties' colors: red, yellow and green.…