Bastei Cologne, Germany, expressionistic architecture, built 1924 changed 1927 overlooking river Rhine as a watchtower. Astrogeographic position. Located in self-protective emotional water sign Cancer sign of river banks, crabs, shells, modernity and indicator for the location on the river bank as the natural habitat of crabs. 2nd coordinate in service-orientated air sign Libra sign of decoration, balance, harmony, stage performances. FL4.