Wairua Falls is a tourist attraction on Wairua Falls Road, Kiwitea, in the Manawatu, rated 4.1 on Google from 1124 reviews. The website linked in the directory is for Wairua Lodge, a rainforest retreat on the Coromandel Peninsula, which is a different place, so it has been ignored here. Confirm access and conditions locally before you go.
A natural attraction such as a waterfall is best visited with some preparation. Check the weather and recent rain first, because tracks can be slippery and streams can rise quickly. Wear sturdy shoes, take water and a charged phone, and stay on marked paths and viewing areas. Waterfalls look their fullest after rain, but that is also when conditions are riskiest, so take care near edges and water. Rural sites often have limited signage and phone coverage, and the access road may be narrow or unsealed, so allow extra time. Take your rubbish with you and respect any neighbouring farmland.
For a short outing into the Manawatu countryside, Wairua Falls is a well-known natural stop near Kiwitea.