They see an impressive looking dark-colored wall on the horizon soon enough, as start going past small settlements with what appear to be farms and ranches in the surrounding area.
The city of Helsburg looks impressive enough over the waves. A blocky, fortified city, built into a hill so that the buildings closer to the center have a commanding view of the buildings further out. The streets are wide and the buildings are all at least four or five stories tall, many larger. There's a palace and a cathedral of some kind further in, and a few hints of trees that may signify parks, from this view.
Abyssia looks rather overawed when they pull up to a dockyard in a wide bay, under a bridge patrolled by guards. The stonework of the channel is neat and well maintained, and while they see a few dingy alleys and the back sides of many buildings the city looks fairly nice even from this 'industrial' position. A customs official-type person comes up and starts haggling with the Captain when the ship docks, and a pair of cutters are lingering inconspicuously near the obvious exit to the dock area.
"...I'll follow your lead," Bys tells Thorn, after collecting her belongings.