Guillermo was a wonderful guide. As a native of Tenerife, he knew the island top to bottom literally. We started in the national park and climbed to mount Tiede. Amazing geology and topography. We felt at times we were on the moon. We also visited local markets and had lunch at one of the stalls in the market. Really felt like a local!! We would highly recommend Guillermo for an immersive tour of Tenerife