Tell me whether these London tourist attractions are free or paid: The National Gallery, The London Eye, Royal Academy of Arts', Tower of London, St. Dunstan in the East
The National Gallery - free
 The London Eye - paid
 Royal Academy of Arts' - free
 Tower of London - paid
 St. Dunstan in the East - free
 Victoria and Albert Museum - free
 Science Gallery London - free
 Barbican Conservatory - free
 Madame Tussauds London - paid
 Harry Potter Studios - paid
 London Zoo - paid