深海 · ABYSS
From sea level to the Challenger Deep:
10,935 m at true scale
One pixel on screen is 0.125 m in reality. Nothing has been compressed.
Most deep-sea diagrams shorten the depth so it fits in one image. This site removed that compression. To descend from the surface to the Challenger Deep you have to scroll 88,240 actual pixels. Most of it is black water with nothing in it. That is what this ocean really looks like.
Begin the descentFree · No sign-up · 12 languages
What you will see
- 23 measured reference lines — the Eiffel Tower (324 m), the Empire State Building (443 m), Ben Nevis (1,345 m) and Everest (8,848 m) laid out at the same scale. The last reference is an airliner's cruising altitude: 10,668 m. The Challenger Deep is deeper than the height at which planes fly.
- 67 entries by depth — the continental shelf, the point where light disappears, the Titanic at 3,800 m, the ecosystem a whale carcass creates, and the bottom.
- A live seafloor map — when the descent ends the map opens: 718 submarine cables, NOAA buoys, Argo floats, and exactly where the 71.3% nobody has surveyed lies.
Why 71.3%
As of April 2026, humanity has mapped 28.7% of the seafloor at high resolution (GEBCO / Seabed 2030). The rest are values inferred from satellite measurements of sea-surface height — not readings taken by a ship.
The abyssal floor that an eye or a camera has actually seen is just 0.001% (Bell et al., Science Advances, 2025). The surface of Mars is mapped in finer detail than the bottom of our own ocean.
Key depths
| Point | Depth | Note |
|---|---|---|
| Challenger Deep | 10,935 m | The deepest point on Earth |
| Airliner cruising altitude | 10,668 m | The trench is deeper |
| Height of Everest | 8,848 m | 2,000 m would still be left |
| Mean ocean depth | 3,441 m | The average of the sea |
| Titanic | 3,800 m | There since 1912 |
| Trieste reached | 10,916 m | 1960, the first time |
Common questions
Wasn't it 10,994 m?
Sources differ. 10,994 m is a 2012 measurement; this site uses the 10,935 m recorded by the Five Deeps Expedition in 2019. Depending on survey method and tidal datum the figures vary by about ±25 m.
Does it work on mobile?
Yes. The scale stays identical; only the presentation changes.
About this site
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Begin the descentSources — GEBCO · Seabed 2030 · NOAA · Argo · TeleGeography