2 Best Sights in Geneva, Switzerland

These 69 peaceful acres of winding paths and streams bear witness to Geneva's early-19th-century fascination with botany. They also include tropical greenhouses, beds of irises and roses, rock gardens, an aviary, a deer park, a garden of scent and touch, a living catalog of economically useful and medicinal plants, a seed bank, and a formidable research institute. Several of the trees predate 1700. The main entrance is opposite the World Trade Organization.

The city first planted this gigantic, and accurate, floral timepiece in 1955 to highlight Geneva's seminal role in the Swiss watchmaking industry. Some 6,500 plants are required four times a year to cover its 16-foot-wide surface.