Wailuku
Kūkaʻemoku, the ʻĪao Needle, is an erosional ridge rising 1,200 ft from the valley floor that looks like a spire seen end-on; it is sacred in Hawaiian tradition.
Out-of-state visitors must reserve a timed entry at gostateparks.hawaii.gov before arriving; non-residents pay $5 per person entry plus $10 per vehicle parking (Hawaiʻi residents free with ID, no reservation). Open daily 7 AM–6 PM; park in the monument lot at the end of ʻĪao Valley Road.