Matroids are hard. Valuated matroids generalize matroids. Tropical linear spaces are equivalent to valuated matroids. Therefore, tropical linear spaces are hard, so are their parameter spaces: the Dressians, the tropical analog of the Grassmannians. Inside the Dressian there is a nicer subset, called the tropical Grassmannian, that parametrizes the tropicalized linear spaces. I will familiarize the audience with these concepts with a lot of examples.