The Caves is a reef wall dive on the outer reef of the Capricorn Bunker Group with plenty of overhangs, caves and crevices, making it particularly suitable for underwater photography and videography. It is dived as a drift at 12-24 m, with visibility of 15-30 m. The operator lists sharks, turtles, sea snakes and pelagic species among the regular encounters, and hard and soft corals cover the wall.

The overhangs and caves provide shaded recesses where soft corals, sponges and schooling fish gather, and where a torch reveals colours lost at depth. Like all of Lady Musgrave Experience's outer-reef sites, it is run as a guided drift from the custom dive tender Underworld: a divemaster leads a free descent, the group drifts with the current, and the skipper follows to collect everyone after a free ascent. Divers need Open Water certification and recent experience, and book through the Adventure Outer Reef Double Dive or an overnight pontoon package.

The operator notes that even the most experienced divers love The Caves, which suggests it is among the more dramatic outer sites. The caves are features to look into from outside as the drift passes, not for penetration. At up to 24 m, it is one of the deeper sites in the programme, so divers should manage their no-decompression time carefully.

It suits Open Water divers with experience and comfort in current, and it is particularly rewarding for photographers. Its exact location is not published, and the operator chooses it according to wind and tide on the day.

Lady Musgrave Island is about 96 km north-east of Bundaberg and 59 km east of the Town of 1770. Lady Musgrave Experience departs 15-17 Marina Drive, Burnett Heads (15 minutes' drive from Bundaberg; parking at the marina) at about 7:30 am for a roughly 2-hour crossing to its pontoon in the lagoon; 1770 Reef Eco Tours leaves the 1770 Marina (free parking beside the marina cafe) for a roughly 90-minute run. Private vessels anchor inside the lagoon via the marked entrance channel through the reef.

Certified divers transfer from the pontoon to the dive tender Underworld for the short run outside the lagoon to the outer-reef drift sites; the site used on the day depends on wind and tide.

The lagoon itself is diveable in almost any weather, but the crossing is open ocean and tours are cancelled when south-easterly trade winds exceed about 25 knots or the swell is over 2.5 m. Outer-reef drift sites are chosen by wind and tide: the northern and western edges shelter from south-easterlies, the southern ledges need light winds or northerlies. Currents strengthen on spring tides and the outer sites are run as drifts on either the flood or ebb.

Cyclone season is November-April; summer storms and plankton reduce visibility. Calmest seas are often September-November and March-April. Outer-reef drift sites are dived on whichever edge is sheltered; the current that makes them good drifts is strongest on spring tides.

Giant-stride from the tender Underworld at the up-current end, make a free descent with the divemaster to the reef edge and drift with the current along the wall or bommie line at the depth set in the briefing. Stay together behind the guide, check under overhangs and in the blue as you go, and ascend with the group for a free-ascent safety stop under the guide's SMB; the tender follows and collects the group.

Lady Musgrave Experience runs daily tours from Burnett Heads (Bundaberg) aboard Reef Empress to its Lady Musgrave HQ pontoon, with certified divers transferring to the dive tender Underworld for the 'Adventure Outer Reef Double Dive'; overnight stays on the pontoon allow extra and night dives. 1770 Reef Eco Tours also dives Lady Musgrave from the Town of 1770.