There is one just outside Los Cristianos at the following:

Autopista, Salida 26, Buzanada. There are daily shuttle buses from Las Americas which according to the website is free. The guided tours are at 10am 1130am 1pm 3.30pm and 4pm

Hope this helps

Thanks Miss Pink. Could you give me the URL of the website please

HERE IT IS

This is not a dedicated site but it gives the info that I mentioned near to the bottom of the page, hope it helps.

Muchas Gracias

Mi placer