Harry Styles took a break from his six-night stand of Mexico City concerts to explore a local botanical garden with his fiancée Zoë Kravitz on Saturday. The 32-year-old groom-to-be and his 37-year-old bride-to-be took a seat on a cement bench and enjoyed a mini-picnic together. August 19 will mark the one-year anniversary of the inseparable couple's first public kiss at Rita's in London. Kravitz flashed a glimpse of her diamond engagement ring, estimated to cost over $500,000, as she munched on fruit. They got engaged in April – one month after Styles told Zane Lowe for Apple Music 1: 'I want a family. I want these things…What do I…