Four field trips are proposed to participants (see map): one pre-symposium (field trip A) and three post-symposium (field trips B, C, and D). Field trips are scientifically based on some of the Portuguese frameworks with international relevance. Field trip bookings will be handled strictly in order of arrival because there are a limited number of places for each field trip. The fees of field trips include transportation, full board accommodation and guidebook (please note, no insurance). The deadline for field trips registration and fees payment is June 30, 2005. If the number of participants for a certain field trip is below the established minimum, the field trip will be cancelled and the paid fee will be returned to each participant.