Mauerpark in Berlin is known for housing an incredible scene on Sunday afternoons in which a hordes flock to the weekly flea market. Once you're done browsing the stalls, you can belt out a couple karaoke tunes while a few hundred spectators clap along at the park's karaoke jam. People crowd onto the ledge of the hill overlooking the single and speakers and wait their turn to sing anything from Snoop Dogg to ABBA.