The most powerful beacon on the Australian coastline, Cape Byron Lighthouse dominates the southern end of the beach at Byron Bay and attracts huge numbers of visitors. You can tour the lighthouse (no children under 5) daily from 10 am, with the last tour departing at 3 pm. The tours are led by volunteers, and while there's no entry charge, a donation is appreciated. Whale-watching is popular between June and September, when migrating humpback whales come close to shore.
Dolphins swim in these waters year-round, and you can often see pods of them from the cape. You can stay in either of the two six-person assistant lighkeeper's cottages for A$340 a night in low season; prices rise from mid-December to late January and a two-week period over Easter (book well in advance during this period). There's a three-night minimum stay.