A Sense of History: Thálatta! Thálatta!
While he never climbs the stairs of this Elf-tower, in Lothlórien Frodo Baggins descends a flight of steps to look into Galadriel’s Mirror, wherein he first sees the sea. This post examines the view.
When Maedhros and Elros were away, Maglor had his problem to solve with no one else but Elrond.
Middle Earth, as a new land was no safer than the old Beleriand. There were people he shouldn't meet on his way of exploration, but Elrond catched the chance.
Elrond made a choice and needed someone to fullfill it.
A relationship in betweeness.