What do a 17th-century Japanese Temple Bell, an historic bridge made of Roxbury puddingstone, and a tree once thought extinct have in common? They all reside in the Back Bay Fens. Learn about these and other treasures on a guided walking tour of the Back Bay Fens that is sure to bring out the history detective in you. The tours, presented by the Emerald Necklace Conservancy, will take place Saturday, May 9 from 11 – 12:30, and Sunday May 17 from 1 – 2:30. Free and open to the public – meet at the Shattuck Visitor Center, 125 The Fenway. Contact 617-522-2700 or email info@emeraldnecklace.org for more information. Dan Tobyne photo below.