Complex sentence: The land was redeveloped in the following decades but late 20th Century slum clearance saw part of the original site opened up as public park initially called Spring Gardens and renamed in 2012 as Vauxhall Pleasure Gardens.
Split into simpler sentences: The land was redeveloped in the following decades, but slum-clearance in the late 20th century saw part of the original site opened up as a public park. This was initially called Spring Gardens and renamed in 2012 as Vauxhall Pleasure Gardens.