If You don't want to pay for etrance to Parque del Drago You can see the Drago tree from Plaza Lorenzo Caceres.
Dragon Tree is 17 meters od high and 6 meters of diameter. Some times ago this tee was appeared on 1000pesos banknote.
Considered that is the oldest tree on the world from Dracaena Draco species. His resin turns red during air contact. Guanch-original inhabitants of the island used this resin to treatment and ambalming bodies. El Drago was the symbol of fertility and wisdom.