The cache is located near the concrete meter structure which used to measure the current of the Yarkon river. It is hard to imagine but years ago this used to be a raging river at times. Since the 1950s a pump at the Yarkon springs has been taking most of the water.
The new GZ is the very small bridge near an eco pool, see photo for help.
About the geo-trail: The Tel-Aviv - Jerusalem Bicycle Trail is a 120 km long path connecting Jerusalem (abbreviated in Hebrew as Y-m or Yam) to the Mediterranean Sea (in Hebrew: Yam). If you want to read more about it, you can enter Yam to Yam Geo-Powertrail: 0 km (GC3TXQD)
About the site:
Seven Mills is a heritage center located at the park and where historic flour mills which ran on power from the river still remain. The Seven Mills flour mills on the banks of the Yarkon River were open until the late 1920s after some of these mills had worked for centuries. Today, the mills are an enjoyable tourist and local attraction, providing visitors with the opportunity to witness an interesting piece of history.