On the edge of madness: the terrors and genius of Alberto Giacometti

He drank with Sartre, mocked Picasso and took silent walks with Beckett – but his work was going nowhere until a vision on Boulevard Montparnasse left him trembling. Ahead of a major Tate show, we explore the obsessions of Giacometti

Put away the gallery guides – art is best when shrouded in mystery

A new app, Smartify, allows you to point your phone at artworks and instantly know everything about them. But while facts can enrich enjoyment, it is the shock of the unknown that really makes art resonate

Sweatbox heaven: welcome to the sauna and steam of your dreams

From steamrooms suspended under remote Czech bridges to the Swedish robot sauna straight out of Star Wars, the spa experience is getting a guerilla makeover

New Old review – everything you need for a techno-utopian retirement

Design Museum, London
From next-gen mobility scooters to bloodstream nanobots, this pop-up exhibition explores how technology can better help an ageing population

Hull: City of Culture 2017 review – prepare for a whale of a time

From old masters to new visionaries, this year’s City of Culture offers a wealth of sensual treats amid a tide of human history