[bxk1]

I thought it was Frankfurt in Germany, but can't confirm, there is only public data on per country connectivity, where Germany is at the top. But Brazil is definitely in top 5, for top 5 connectivity from last year the countries were: Germany, Brazil, Ukraine, U.K., Switzerland. Submarine cables are only a small part of connectivity.

[nixass]

Correct, Frankfurt and Amsterdam are densest submarine fiber endpoints in Europe at least. FRA is EU's main financial and business hub, and even AMS, which has huge bandwidth, serves only as a transit location for FRA fiber. Frankfurt is about to become Europe's datacentre alley. Dublin is ahead now, but they will take over pretty soon

[kzrdude]

Frankfurt is also close to NATO's european command center