I was there in 2017, the landscape is stunning. I visited the volcanic park of Timanfay and smaller volcanoes you can go into like el Cuervo. There are also other nice places to visit like the Mirador Del Rio and (if you like it), the Saramago home museum. I also visited Tenerife, which while much more touristy, is also much cheaper and also has the Teide Volcano which you can visit.