Just before Lake Ferry, turn left (coming from Martinborough) at the sign for Cape Palliser and drive another 15 km (9 mi) around Palliser Bay to Te Kopi, where the Putangirua Pinnacles Scenic Reserve is protected from the hordes by its relative isolation. The spectacular rocks have been formed over the last 120,000 years as rains have washed away an ancient gravel deposit, and pinnacles and towers now soar hundreds of feet into the air on both sides of a stony riverbank.
An hour-long round-trip walk from the parking area takes you along the riverbank and close to the base of the pinnacles. If you're feeling adventurous, a three- to four-hour bushwalk involves some steep climbs and wonderful vistas of the coast—as far off as the South Island on a clear day. Stout footwear and warm clothing are essential. The Pinnacles are an hour's drive from Martinborough. The Martinborough visitor bureau is the best place to check for more information.