We spend some time with some celebrity trees – one in Washington DC and one in Berlin – that have left an impact on all who visit them. Today’s stories are brought to you by Michelle Cassidy and Diana Hubbell, of the Atlas Obscura Places Team.

In 2012, the city of Melbourne gave every tree a barcode and email address so people could report when it needed maintenance or attention. But, a funny thing started happening. Instead of reporting problems, people began emailing love letters to the trees. MORE: Is there a special tree in your...