Since 2010 I live in Vienna and my favourite place is the Central Cemetary. I know this sounds super weird but it isn't - let me explain why:
Vienna is a big, exciting and loud city - everything I don't like. I was born and raised in a rural area of Austria without many people around so I get overwhelmed by the city quite easily. The cemetary is only 10 minutes away from my flat so I can reach it with my bike and spend some nice hours there. The cemetery is one of the largest of the world and offers a lot of nature and green areas. You can easily calm down since nobody is loud. I often take long walks and enjoy nature.