Complex sentence: The Elfvik farm has been preserved within the Långängen-Elfvik national park and most of the original houses, built from the end of the 18th century up to mid- 19th century, have been saved and restored.
Split into simpler sentences: The Elfvik farm has been preserved within the Långängen-Elfvik national park. Most of the original houses, built from the end of the 18th century up to mid- 19th century, have been saved and restored.