Boyd's Tower is situated on the southern headland of Twofold Bay, Eden, NSW. It was built under the instruction of Benjamin Boyd, a London stockbroker with ambitious commercial plans for this area of the south coast of New South Wales.

The tower was built between 1846 and 1848 and was intended to be a lighthouse. It rises some 23 metres above the headland surrounded by the sea on three sides.
and is made of sandstone. Each block of stone was pre-cut, numbered and sent by sea from Sydney to be assembled on site.

The tower failed to satisfy an official inspection and was never completed. Instead, it came to be used as a convenient lookout for whales.

During season, the tower was manned daily and when a whale was observed, boat crews were alerted with a gunshot.