The ruins – staircases, terraces, temples, palaces, towers, fountains and the famous Intihuatana (the so-called ‘Hitching Post of the Sun’) – require at least a day. Take time to appreciate not only the masonry, but also the selection of large rocks for foundations, the use of water in the channels below the Temple of the Sun and the surrounding mountains.
Huayna Picchu, the mountain overlooking the site (on which there are also ruins), has steps to the top for a superlative view of the whole site, but it is not for those who are afraid of heights and you shouldn’t leave the path. The climb takes up to 90 minutes but the steps are dangerous after bad weather. The famous Inca bridge is about 45 minutes along a well-marked trail south of the Royal Sector. The bridge (on which you cannot walk) is spectacularly sited, carved into a vertiginous cliff-face. East of the Royal Sector is the path leading up to Intipunku on the Inca Trail (45 minutes, fine views).