* Plymouth's National Marine Aquarium is designed to foster an appreciation of aquatic environments. So visitors can start off with shallow streams, before taking the plunge into the depths of the Atlantic, and further afield with the coral refs and limpid waters of the Caribbean for an encounter with sharks. Tel:01752 600301. www.national-aquarium.co.ukOpen daily. Admission: pound;4.50 with tour. pound;5.50 adults.
One adult free per seven primary, or 10 secondary pupils.