Grimstad is the town of Henrik Ibsen and Knut Hamsun, and there are many traces of these famous writers to be found. Henrik Ibsen's story is told in the building where he worked as an apothecary's assistant in his youth – the pharmacy in which he wrote what was to become Catilina, his first play. The Ibsen Museum in Grimstad is the oldest of its kind in the country.
Knut Hamsun moved to Nørholm with his family in 1918. He sympathised with Hitler-Germany during the war, and was eventually detained at old Grimstad Hospital. In his novel "On Overgrown Paths", Hamsun describes his walks in the area around the hospital. Two of these are today way-marked, and are known as "Hamsun’s footpaths".
Just outside the town centre is a beautiful park with a stunning display of trees, shrubs, roses, and summer flowers. Dømmesmoen is an old cultural landscape featuring burial mounds and stone formations. It is also where the Norwegian Museum of Horticulture is located, and there are numerous way-marked walks in the area.