Tau Kiani botanical garden offers a quieter look at Rapa Nui plant life near Hanga Roa, away from the island's headline archaeological sites. It is a modest stop, but useful for understanding the fragile vegetation and restoration themes that sit behind the island's landscapes.
Do not treat it as a substitute for the moai sites or crater walks; treat it as a short, reflective add-on. It is most worthwhile with local context or a guide who can explain native and introduced plants.