Ancient man-made structures uncovered in the swamp… and then a jaw-dropping revelation on Lot 8 that could rewrite Oak Island history. Has the island finally started giving up its secrets after 230 years?

In the latest episode of The Curse of Oak Island Season 13, titled “The Sands of Time” (aired March 31, 2026), the Lagina brothers and their team faced fresh disappointments while chasing new leads across the island. After the Top Pocket Find (TPF-1) caisson yielded only searcher-era artifacts from collapsed shafts rather than the anticipated breakthrough, the crew regrouped in the War Room to redirect their efforts.

The episode shifted focus to the swamp, where the team discovered compelling evidence of ancient man-made workings. Soil samples and unusual sand layers — which Rick Lagina dramatically referred to as “the sands of time” — suggested human engineering and intervention dating back centuries. These findings hinted at hidden structures, possible pathways, or platforms deliberately constructed and later buried by time and nature.

Meanwhile, on Lot 8, the investigation took a dramatic turn. After previously moving a massive 40,000-pound boulder, the team examined what lay beneath it. While geologist Ian Spooner and others initially leaned toward it being a natural glacial erratic, further analysis of surrounding materials, including mortar samples, sparked intense debate. The structure’s shape and composition led some team members to believe it could be a man-made foundation or platform rather than a random glacial deposit.

Adding to the intrigue, Marty Lagina and Gary Drayton explored Lot 5, where they uncovered a covered well (an old stone well). The discovery indicated that people once lived or worked on that lot and had access to a reliable water source — strong evidence of sustained human activity on the island long before the modern treasure hunt began. This well could potentially connect to the mysterious stone structures and earlier finds, strengthening theories about medieval or 17th-century occupation.

The episode balanced technical analysis with the team’s growing excitement and frustration. Rick and Marty emphasized the need for patience and rigorous scientific verification, while the “sands of time” metaphor underscored how centuries of sediment had concealed clues that are only now coming to light.

Although no major treasure was recovered, “The Sands of Time” delivered several incremental but meaningful clues: man-made features in the swamp, a potentially artificial structure under the Lot 8 boulder, and the revealing well on Lot 5. These elements continue to fuel speculation about the Knights Templar, early European visitors, or even older civilizations interacting with Oak Island.

As Season 13 heads toward its final episodes, the team remains more determined than ever. The discoveries in this episode suggest that the island’s secrets are slowly being revealed — not through one dramatic find, but through layers of history uncovered one careful dig at a time.

Fans are already buzzing about how these new leads might tie previous finds together and whether the “shocking revelation” on Lot 8 will open a completely new chapter in the 231-year-old mystery.