Sundalandia Discovery Society · Sunda Sea, Indonesia

The
Submerged
Cradle

A multidisciplinary expedition to a drowned world beneath the Sunda Sea — and the question it forces us to ask about where civilization truly began.

The Hypothesis−15M

Rewriting the origins of humanity

At the close of the last Ice Age, a landmass larger than India stitched Southeast Asia together. Then the sea took it.

Around 11,700 years ago, post-glacial flooding drowned the vast Sunda Shelf in a series of catastrophic events echoed across the world's "great flood" traditions. Our central question is a bold one: was Sundaland a flourishing maritime culture whose survivors carried knowledge outward — seeding agriculture, astronomy and language into the settlements that later became Mesopotamia and Egypt?

The Sundalandia Discovery Project exists to test that hypothesis with rigorous, multidisciplinary science — geology, marine bathymetry, paleoclimatology and human migration studies — and to bring the evidence to the surface.

~11,700
years ago · the drowning
1.8M km²
shelf submerged
−90m
anomaly depth
Sunda Shelf around 21,000 years ago — maximum exposed land joining Sumatra, Borneo and Java. Sunda Shelf around 11,600 years ago — partially drowned by rising seas. Sunda region today — present-day coastlines with the shelf submerged.
Glacial maximum · land exposedRapid drowning underwayPresent-day coastline

~21,000 years ago. At the glacial maximum, seas sat ~120m lower and the exposed Sunda Shelf joined Sumatra, Borneo and Java into one continent — larger than modern India.

Palaeogeographic maps © Dhani Irwanto

The Vision · 01:19−25M

See the world we're diving for

A ninety-second descent into the mystery, the evidence, and the mission ahead.

The Evidence−40M

A case built across three disciplines

No single reading proves a lost world. Converging lines of evidence make it a question science can no longer ignore.

Geological · The Site

The Sangiang Anomaly

6 KM BASIN · 90 M DEPTH

High-resolution multibeam bathymetry near Sangiang Island has mapped a striking rectilinear feature — a near-perfect square basin flanked by wall-like structures. Its geometry is difficult to explain by natural processes alone, and researchers believe it warrants direct investigation.

Paleoclimatology · The Event

The Younger Dryas

~11,700 YEARS AGO

The abrupt climate reversal at the end of the last Ice Age drove rapid sea-level rise that submerged the Sunda Shelf. The timing aligns with "great flood" accounts recorded independently by cultures across the ancient world.

Anthropological · The Migration

Eden in the East

OPPENHEIMER · OXFORD

Prof. Stephen Oppenheimer's research traces threads of language, myth and technology outward from Southeast Asia. It offers a framework for how a displaced Sundaland population could have influenced the rise of later civilizations.

3D reconstruction of the Sangiang anomaly — a rectilinear ~6 km basin resting ~90 m down.
Anomaly reconstruction · 6 km basin
Phase I multibeam bathymetry (plan view) over the Sunda Strait nautical chart, with a 0–25 km scale.
Multibeam survey · plan view
3D bathymetric relief of the Sangiang seabed from the Phase I survey.
3D bathymetric relief
Phase I · Bathymetric Survey

The scan that started it all

Phase I multibeam mapping of the Sunda Strait produced the first detailed picture of the seafloor around Sangiang — the plan-view survey and 3D relief shown here. This is the target Phase II goes back to film.

Precedent close to home: the megalithic site of Gunung Padang in West Java has drawn international attention for evidence of great antiquity — a reminder that Indonesia's deep past may be far older than the textbooks assume.

The Expedition−70M

From sonar to seafloor

A phased mission that moves from remote mapping to human hands on ancient stone — broadcast to the world.

Phase IComplete

The Survey

Multibeam bathymetric mapping of the Sunda Strait has located and characterised the Sangiang anomaly, establishing the target and the scientific case for going deeper.

Phase II2026 · Seeking funding

ROV Deployment

Deep-sea remotely operated vehicles descend to −90m to capture the first high-resolution footage of the structure, documenting its scale, surfaces and geometry.

Phase III2027 · Seeking funding

Live Dives & Recovery

Technical divers and scientists conduct in-person expeditions to survey the site and recover artifacts — culminating in a live global broadcast of the discovery.

Operational roadmap of the Sunda Strait Project 2026–2027 — Phase I preliminary data acquisition, Phase II targeted acquisition and ROV dive (2026), Phase III live dive and extraction (2027).
Operational roadmap · The Sunda Strait Project, 2026–2027
DEPTH −90M · SUBMERGED MONOLITHIC GATEWAY

Ninety metres down, colossal carved pillars may still stand.

If the anomaly is what the data suggests, it is a testament to engineering that predates every monument we thought came first. There is only one way to know for certain — to go there.

Help us reach the seafloor
Artist's impression — a diver and ROV examining a submerged megalithic wall.
Artist's impression — what a Phase III dive on the wall could reveal
The SocietyRESURFACING

Led by people who've done this before

A registered Indonesian scientific society, governed by a Board of Trustees and led by founders in geology, oceanography, hydrography and energy.

Board of Trustees

Dr. Fadli Zon

Dr. Fadli Zon, S.S., M.Sc.

Chairman, Board of Trustees

Indonesia's Minister of Culture, and a historian and author with a longstanding interest in Indonesian history and heritage. He holds a Master's in Development Studies from the London School of Economics and a doctorate in History of Economic Thought from Universitas Indonesia.

Jaya Suprana

Jaya Suprana

Trustee

A prominent Indonesian cultural figure — pianist, composer, writer and entrepreneur — and founder of the Museum Rekor-Dunia Indonesia (MURI). He has been active for decades across the arts, education and cultural initiatives in Indonesia and abroad.

Prof. Dr. Jatna Supriatna

Prof. Dr. Jatna Supriatna, Ph.D.

Trustee

One of Indonesia's leading conservation biologists, a professor at Universitas Indonesia and member of the Indonesian Academy of Sciences (AIPI). Four decades researching biodiversity and evolution across the archipelago; PhD in Biological Anthropology (New Mexico), postdoctoral research at Columbia.

Founders

Bob S. Effendi

Bob S. Effendi

President

Energy professional with over 30 years across oil & gas, mining and nuclear. He co-founded and leads PT Xpert Synergy Solution, a consultancy focused on clean energy and nuclear projects in Indonesia.

Prof. Danny Hilman, PhD

Prof. Danny Hilman, PhD

Director of Research

Senior geologist at Indonesia's BRIN specialising in geophysics, tectonics and paleoseismology, with a Caltech PhD and an ITB master's. His fault mapping has advanced understanding of seismic hazards across the Pacific Ring of Fire.

Gegar Prasetya, PhD

Gegar Prasetya, PhD

Principal Investigator

Coastal engineer and tsunami researcher chairing the Indonesian Tsunami Association (IATsI). Trained at ITB with graduate degrees from the University of Waikato in coastal oceanography and tsunami modelling, he leads the Tsunami Research Foundation Indonesia.

Laksma TNI Dr. Ir. Trismadi, M.Si., IPU

Laksma TNI Dr. Ir. Trismadi, M.Si., IPU

Secretary

A retired Navy Rear Admiral and senior hydrographer, formerly Deputy Chief and Inspector of the Hydro-Oceanographic Centre (Pushidrosal). His fields include hydrographic surveying, seabed mapping, nautical charting and underwater acoustics.

Registered as a legal association with the Ministry of Law of the Republic of Indonesia — Decree No. AHU-0007040.AH.01.07.TAHUN 2025, 15 September 2025.

RecognitionON RECORD

Backing at the highest level

The Society's work has been presented to — and supported by — senior figures in Indonesian culture, science and industry.

Minister of Culture Fadli Zon with members of the Sundalandia Discovery Society, November 2025.
Minister of Culture Fadli Zon, who also serves as Chairman of the Society's Board of Trustees. 21 November 2025
Founders Bob S. Effendi and Prof. Danny Hilman with trustees Dr. Fadli Zon and Jaya Suprana at the minister's office, August 2026.
Founders Bob S. Effendi and Prof. Danny Hilman with trustees Dr. Fadli Zon and Jaya Suprana at the minister's office. August 2026
Hashim Djojohadikusumo, founder of the Arsari Foundation, meeting the Sundalandia Discovery Society team, July 2025.
Hashim Djojohadikusumo, founder of the Arsari Foundation, pledges his full support to the expedition. 7 July 2025
Backed by
Yayasan Arsari Djojohadikusumo · Jaya Suprana Institute
Back the ExpeditionSURFACE

Fund the discovery of a lifetime

We operate independently of state budgets. Backers make Phases II & III possible — the dives that turn a hypothesis into history.

  • Scientific Legacy

    Be named among the patrons who funded the search for the birth of civilization.

  • Global Media Rights

    Exclusive access to documentary footage and co-producer status on the live-dive global broadcast.

  • Institutional Backing

    Join high-profile supporters already standing behind the mission's national significance.

Crowdfunding Campaign

Back us on Kickstarter

Phase II sends our ROV to −90m to capture the first footage of the structure. Explore the full budget, reward tiers and timeline on the campaign page.

Back Phase II · $350,000 goal
Phase II · ROV Deployment to −90m