# landed at Caesarea

"arrived at Caesarea." The word "landed" is used to show that he arrived by ship.

# he went up

He traveled to the city of Jerusalem. The phrase "went up" is used here because Jerusalem is higher in elevation than Caesarea.

# greeted the Jerusalem church

"greeted the members of the church of Jerusalem" 

# then went down

The phrase "went down" is used here because Antioch is lower in elevation than Jerusalem.