Disappearing past

Another building from my past has been torn down. This one was my Aunt Yvonne's house in Evesham Road, a 1930's semi-detached, I remember a long garden with an old air-raid shelter where spiders lived. Now it is gone with the rest of its row of 1930's house, they are being replaced with Regency-style town houses. These will extend an existing terrace and in years to come no one will notice the join between the originals and the repros.
A lot of my past has gone... Victorian schools are now small housing estates, CCB was demolished and another Regency style housing block built, I wonder if that to is haunted? I feel a bit like Alice in Wonderland when she realized she couldn't go back as her path had been eradicated, does it matter? Why should I want to revisit my past? Why do archaeologists spend time delving into other people's past?
In the film Labyrinth there is a character who carries her life's possessions around with her. Of course she is so weighed down by them she isn't able to move easily, they hamper and prevent her enjoying the present and being open to the future. Sometimes we have to let go of the past.