A hidden pearl right in the center at Porsgrunn City Museum. This is really worth a visit.
Pleasant historical garden, recreated and planted with historically documented plants as it was at the end of the 18th century.
Guided tours daily through the summer, although you can also go round by yourself.
Prestegårdstunet is also home to Porsgrunn's best-kept secret, Tunet cafeteria, where you can imagine yourself living in days past while enjoying a cup of coffee and a bite to eat.