Discover Comet Meetings in Madrid. Named El Parque del Tesoro, our site will be the setting for your meetings in the heart of the Spanish capital! Adjacent to the Retiro Park, our site has an unobstructed view of the latter. Thus, attentive to reflect the richness of Madrid, we wanted the design of our site to honor its famous neighbor and its specificities: its old zoo, its ponds, etc. . The Comet experience is the combination of a unique setting and a high level of service, designed to unleash the collective intelligence of the participants and guarantee the well-being of each one.