My picture of the day Tunnel view – Callahan Share on Facebook Tweet on Twitter *My Picture of the day* - Tunnel view - Callahan Tunnel built under Boston Harbor 50 years ago, connects downtown to Logan international airport, Boston, Massachusetts, USA. ****** Dr.Surendra www.drsurendra.com www.instagram.com/dr.surendra.2017 *My Picture of the day* –Tunnel view – Callahan Tunnel built under Boston Harbor 50 years ago, connects downtown to Logan international airport, Boston, Massachusetts, USA.******Dr.Surendrawww.drsurendra.comwww.instagram.com/dr.surendra.2017