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UpToWhere · Can you see it?

Can you see the White Cliffs of Dover from Cap Blanc-Nez, France?

Yes — you can

34.2 km line of sight toward the northwest (bearing -47°), computed on 30 m Copernicus terrain with Earth curvature and standard atmospheric refraction.

The Channel's most famous view: on a clear day the white chalk wall of England glows across the water from the French coast. How much does Earth's curvature actually hide at this distance?

3D terrain view from Cap Blanc-Nez, France toward the White Cliffs of Dover
Straight-line distance34.2 km
Direction-47° northwest
Observer eye level131 m
Target elevation112 m
Curvature drop at the target80 m
Clearance margin+113 m

From Cap Blanc-Nez, France, at an eye level of 131 m, the sightline to the White Cliffs of Dover runs 34.2 km and clears every ridge in between. Over that distance Earth's curvature drops the target 80 m below a flat-earth line — but at 112 m, it still rises above the horizon. The view is geometrically real: whether you actually get it depends on haze, not terrain.

The line on the map

Satellite map with the sightline from Cap Blanc-Nez, France to the White Cliffs of Dover drawn in red
The 34.2 km sightline over satellite imagery, drawn as the great-circle path light would follow.

The terrain profile

-0 m250 m500 m750 m sightlineCap Blanc-Nezthe White Cliffs of Dov… 0 km34.2 km102030
Elevation profile from Cap Blanc-Nez, France to the White Cliffs of Dover. Like every elevation profile, the vertical axis is stretched (≈15× here) — but the geometry is real: mid-path, Earth's surface genuinely stands 23 m above the straight line between the two points (the dashed arc is sea level). Light bends only slightly around that bulge, so whatever it covers stays hidden.
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Frequently asked questions

Can you see the White Cliffs of Dover from Cap Blanc-Nez, France?

Yes. The terrain-limited line of sight is clear across 34.2 km, accounting for Earth's curvature and standard atmospheric refraction. Atmospheric haze is the only thing that can hide the view.

How far is the White Cliffs of Dover from Cap Blanc-Nez, France in a straight line?

34.2 km great-circle distance, on a bearing of -47° (northwest).

How much does Earth's curvature hide over 34.2 km?

At the target's distance the curvature drop is about 80 m: anything lower than that (relative to the observer's horizon plane) is hidden behind the bulge of the Earth. The White Cliffs of Dover is tall enough to rise above it.

How was this calculated?

UpToWhere walks the full terrain profile between the two points on 30 m-resolution Copernicus GLO-30 elevation data, applying Earth curvature and standard atmospheric refraction (k = 0.13) — the same physics surveyors use. You can run the same point-to-point check between any two places on Earth.

More famous sightlines

Wondering about a different pair?

The free calculator shows how far you can see from any point on Earth. Pro adds point-to-point checks — this exact analysis, between any two places you choose.

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