Complex sentence: The park and gardens laid out by Beaumont between 1689 and 1712 have survived remarkably intact: they have been described as retaining "almost all of the essential elements of the completed scheme as shown on maps of the park and gardens of 1730".
Split into simpler sentences: The park and gardens laid out by Beaumont between 1689 and 1712 have survived remarkably intact. They have been described as retaining "almost all of the essential elements of the completed scheme as shown on maps of the park and gardens of 1730".