Antik und Buch Markt Berlin Antique and Book Market Museumsinsel flea market summer Stadtbahn Bridge train egg cups food truck Bodemuseum Bratwurst Mitte Stadtbahnbrücke Museumsinsel Stadtbahnbrücke afternoon booth booths bridge china crystal eggcups flohmarkt glasses glassware shoppers shopping stalls stand underpass weekend antique market Bode Museum tourism Museum Island summer Sunday blue sky fluffy clouds white clouds fluffy white clouds cumulus clouds Mitte Germany