What is it?

The SS President Coolidge was once the pride of American ocean travel — a gleaming 199-metre luxury liner with swimming pools, a barber shop and chandeliers — before being requisitioned as a troopship in World War II. On 26 October 1942 she struck friendly mines while entering the harbour at Espiritu Santo, and her captain ran her aground so 5,340 men could scramble ashore; only two lives were lost before she slid backwards into the depths. Today she lies on her port side in warm, clear water, her bow at around 21 metres and her stern dropping past 70, making her the largest and most easily accessible shipwreck in the world open to recreational divers. Inside, you finning past jeeps, howitzers, helmets, rifles, medical supplies and rows of toilets frozen in time, torchlight catching the famous porcelain bas-relief known as 'The Lady' — a woman riding a unicorn above what was once the first-class smoking room. It is part dive, part underwater museum, part war grave, and the sheer scale of the hull emerging from the blue is something photographs never quite capture.

Where is it?

The wreck lies in Segond Channel just off the shore at Luganville, the main town on Espiritu Santo, Vanuatu's largest island — a short flight from Port Vila. Uniquely, most dives begin as a shore entry: you walk in from a coral-rubble beach and follow a guide rope down to the bow within minutes. Diving is possible year round in 26–29°C water, but the drier, calmer months from April to October offer the best visibility and most comfortable surface conditions; nearby Million Dollar Point, where the US military dumped its surplus equipment into the sea, makes the perfect second dive.

What makes it worth it?

There is a moment, hovering above the bow with the hull stretching away into green haze, when the ship stops being a dive site and becomes a story — of men who ate breakfast here, of a captain's split-second decision, of a war that reached this quiet corner of the Pacific. Divers routinely describe the Coolidge as the wreck that ruins all other wrecks: 'I've dived it fifteen times and still haven't seen it all,' is a common refrain among returning visitors. Squeezing through cargo holds past jeeps still parked in rows, or shaking hands with 'The Lady' by torchlight, gives you goosebumps that have nothing to do with water temperature. Many divers finish with a decompression stop in the shallows surrounded by clownfish and coral, quietly reflecting on the strange beauty of a tragedy turned reef. Years later, it's not the fish you'll remember — it's the eerie hush of a grand ballroom full of ocean, and the sense of swimming through a page of history.

How accessible is it?

Physically, it's one of the easiest world-class wrecks to reach: no boat is required, and the walk-in entry suits any reasonably fit diver, though carrying tanks over rubble and long swims mean decent stamina helps. Open Water divers can enjoy the bow, promenade decks and outer structures, but the deeper, more atmospheric penetration dives to 'The Lady', the cargo holds and the engine room require Advanced, Deep, Wreck or technical certification, and nitrox is strongly recommended. Local operators in Luganville such as Allan Power Dive Tours and Santo Island Dive typically charge around USD 60–90 per guided dive, with multi-dive packages, gear hire and nitrox available; most divers stay four to seven days to do the wreck justice. Getting there means an international flight to Port Vila plus a domestic hop to Santo, and you'll need to respect a strict no-fly window of 24 hours after your last dive. Dive insurance is essential, the nearest recompression chamber is limited, and because the site is a war grave, removing artefacts is forbidden.