Building tall on flat ground is already a geotechnical puzzle. Building tall on a steep mountainside — where gravity is constantly trying to pull the whole hillside downhill — is a completely different problem, and this video from a small foundation-engineering channel walks through how it's actually done.

The focus is on geotechnical monitoring: the instrumentation and design decisions that let engineers place massive vertical structures on slopes that would otherwise creep, slide, or fail under load. Expect discussion of anchored foundations, slope stabilization, load transfer into competent rock, and the sensors (inclinometers, piezometers, extensometers) that give engineers early warning when a slope starts to move.

What makes this worth watching over the many shorts and hashtag-spam entries in today's batch is that it treats slope construction as a continuous engineering problem — not just "pour a big foundation" but an ongoing conversation between the structure and the mountain it sits on. It's the kind of content that connects concepts (soil nailing, tiebacks, drainage, monitoring) into an actual buildable system rather than isolated diagrams.

A solid pick if you want to understand why hillside cities like Hong Kong or Chongqing don't just slide into the sea.