Kaiserschleuse

Here you can watch the big pots.

Lock for large ships ⛴

The Kaiserschleuse is a lock in the city of Bremen's overseas port area of Bremerhaven. It connects the imperial ports I – III with the Weser.
The first (small) Kaiserschleuse was built in 1876 as a cross direct connection to the Kaiserhafen (I). When it was no longer sufficient for the ships of the North German Lloyd, the second (large) Kaiserschleuse was built from 1892 onwards. The commissioning took place on August 23, 1897, the official inauguration on September 20, 1897. At that time it was with a length of 223.2 m between the heads (chamber length 200 m), a passage width of 28 m (chamber width 45 m) and one Threshold of 7.0 m below sea chart zero, it is by far the largest lock in the world. The construction costs amounted to 18.5 million marks (converted and adjusted for inflation about 128.7 million euros), a total of over 20,000 piles were driven and 25 million bricks were installed.
de.wikipedia.org/wiki/Kaiserschleuse

Great. Just go and look.