UpToWhere
UpToWhere Can you see it?

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

Yes, you can

34 km line of sight toward the southeast (bearing 134°), computed on 30 m Copernicus terrain with Earth curvature and standard atmospheric refraction.

The answer

Yes. Cap Blanc-Nez, France is visible from the White Cliffs of Dover across 34 km, looking down: Earth's curvature drops the target 79 m, leaving its top 57 m below eye level and still clear of the ground in between.

The most-asked sightline question in Britain: stand on the white cliffs on a clear day and a low grey line appears across the Channel. That really is France, and the geometry says exactly how much of it you get.

3D terrain view from the White Cliffs of Dover toward Cap Blanc-Nez, France
Straight-line distance34 km
Direction134° southeast
Observer eye level107 m
Target elevation129 m
Curvature drop at the target79 m
Below your eye level57 m

From the White Cliffs of Dover, at an eye level of 107 m, the sightline to Cap Blanc-Nez, France runs 34 km and clears every ridge in between. Over that distance Earth's curvature drops the target 79 m below a flat-earth line, but at 129 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 the White Cliffs of Dover to Cap Blanc-Nez, France drawn in red
The 34 km sightline over satellite imagery, drawn as the great-circle path light would follow.

The terrain profile

0 m250 m500 m750 m sightlinethe White Cliffs of Dov…Cap Blanc-Nez 0 km34 km102030
Elevation profile from the White Cliffs of Dover to Cap Blanc-Nez, France. 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.
Check your own two points with the calculator →

Frequently asked questions

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

Yes. The terrain-limited line of sight is clear across 34 km, accounting for Earth's curvature and standard atmospheric refraction. Atmospheric haze is the only thing that can hide the view.

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

34 km great-circle distance, on a bearing of 134° (southeast).

How much does Earth's curvature hide over 34 km?

At the target's distance the curvature drop is about 79 m: anything lower than that (relative to the observer's horizon plane) is hidden behind the bulge of the Earth. Cap Blanc-Nez, France 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.

Open the calculator