[wiki=72374ce78369594852951015e37ec6c1]Salta[/wiki] - 4 hours 6 daily departures $108 with FlechaBus (Jun 2014) [http://ecommerce.sittnet.net/ar/3000/]
[wiki=73d48a607a15d41ee9bf7dee85960d01]Tucumán[/wiki] - 5.5 hours, 4 daily departures $164 with Aconquija (Dec 2013) **the route is sometimes closed during the rainy season
You may take a private guided tour through Shell Gorge to Cafayate or take the two day small group tour through the Calchaqui Valley via Cachi. There are also minibus day tours for the drive through the gorge with various stops at the colored rock formations such as the Devil's Throat, Amphitheatre and Obelisk.
[wiki=72374ce78369594852951015e37ec6c1]Salta[/wiki] - Ride comfortably with air-conditioning and your own private English-speaking driver, with the option to stop at a variety of bodegas, quaint towns, and historic sites along the way. [http://www.ponchotours.com/]