Spring waves its luxuriant, green wand over the city. The wildflowers raise their red, blue and yellow heads and dance above the meadow grass. The hedges that line the streets and gardens are thick and green. New bright leaves adorn the ancient oaks and chestnuts. Everywhere is a pink or blue abundance of azaleas, rhododendrons, lilacs and wisteria but across the mirrored silver lake the steeply-rising Jura Mountains are still tipped with a thin ribbon of snow, a lingering reminder of the bare coldness of now almost swept-away winter.