The canal.
It fills with seawater
during extra-high tides [like it is now], and during storms at sea.
Whenever it rains hard [not often], it fills with drainage runoff.
Most of the time it's dry.
File: crystal_cove_19.jpg File size: 1,273KB Image Serial Number: 100-0042 Camera Model: Canon PowerShot G2 Firmware: Firmware Version 1.10 Owner: Rad Date/Time: 2003.06.13 18:52:23 Shutter speed: 1/50 sec Aperture: 2.2 Exposure mode: Auto Flash: Off Metering mode: Evaluative Drive mode: Single frame shooting ISO: Auto Lens: 7.0 to 21.0 mm Focal length: 7.0mm Subject distance: 1.58 m Macro focus: On AF mode: Single AF Focus point: [Center] Image size: 2272 x 1704 Rotation: none Image quality: Superfine White balance: Auto Saturation: Normal Sharpness: Normal Contrast: Normal