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 Maglor attempt to steal the Silmarils after the War of Wrath, they are seized and taken as prisoners back to Valinor. As it turns out, a pardon has been negotiated on their behalf - but no one bothered to tell them this, or the unique conditions on which they have been released from their oath. They have simply been tied up and dumped in two different remote locations: Maglor outside a white tower near the borders of the Sundering Seas, and Maedhros on a dock at the rim of the world.
[Maedhros and Maglor are Eärendil and Elwing's war prizes and everyone has sex.]