The Soulsand Valley's naturally generated bone structures can generate at the top of the nether resulting in an accessible open path to the nether roof.

Example

Seed: -2200534683779441623

Teleport Command: /execute in minecraft:the_nether run tp @s 10314.19 129.43 899.25 358.49 26.39

NOTE: In screenshot attached, the bone blocks have been broken to visualize the available path.