If you want to find bananas in Trinity College, a new book reveals the whereabouts of an enormous banana tree. It's on one of the routes described by Fergus Mulligan in T rinity College Dublin: A Walking Guide, published by the College Library (€7.99).

Located at the main door of the Hamilton Building, the tree flourishes among the mathematicians and scientists, and is just one of the interesting sights covered by the book, an invaluable source of information about the buildings and campus.

More than 18,000 people study, teach and work in the 400-year-old university, but most visitors never get beyond Front Square and the Book of Kells.

This book takes in the loveliest classical squares, the route from Parliament Square to College Park, and the lesser-known science quarter.