Enjoy two of londons great attractions with this flexible tour of the river thames and entrance to the sea life london aquarium hop on and hop off your river sightseeing cruise from four conveniently located piers for 24hr and explore the varied and fascinating marine life at the sea life london aquarium where hundreds of species are available from all around the world across 14 themed zones get up close and personal with sharks octopus stingrays and piranhas this is a great family exper