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Aerial view of four people paddleboarding down a river.

Explore

Historical & Cultural Sites

The Wailua River Valley is deeply rooted in Hawaiian history.

Photo: tour listing on Viator

Once reserved for royalty, the lands surrounding the river contain important cultural landmarks. You can reach these sites by boat or by driving along Kuamoʻo Road.

Person swimming in a pool at the base of a tall waterfall.
Photo: tour listing on Viator
01

Fern Grotto

1-2 hoursAccessible by water

This natural lava-rock cave features draping ferns and incredible acoustics. Historically reserved for Hawaiian royalty, it remains a highly sacred site. You can book an open-air boat tour to hear live music inside, or paddle your own kayak to the landing.

Aerial view of a boat navigating a winding river.
Photo: tour listing on Viator
02

Wailua River Overlook

15 minutesKuamoʻo Road access

This scenic wayside stop sits along Kuamoʻo Road. It offers elevated views of the river winding through the green valley. Park in the ʻŌpaekaʻa Falls lot and carefully cross the street via the marked crosswalk.

Tour photo
Photo: tour listing on Viator
03

Poliahu Heiau

20 minutesStay on marked paths

This ancient Hawaiian temple overlooks the valley from a strategic point near the river. When visiting, please respect the site's cultural significance. Stay on the marked paths and never move any stones.

Cruise to the Grotto

Smith's Boats docked on a wide river surrounded by lush greenery.
Kauai Cruise Ship Excursion: Wailua River & Fern Grotto3 h 30 min 4.1 (59)from $109
river cruisefrom $109 on Viator
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