Today's crop is heavy on hashtag-spam Shorts and generic "mega machines" reels, so the pickings are slim. The Millau Viaduct entry from Blind Facts is the least-bad option — it at least focuses on a single, genuinely remarkable structure with a clear engineering story to tell.

The Millau Viaduct in southern France is the tallest cable-stayed bridge in the world, with its highest mast rising 343 meters — taller than the Eiffel Tower. It crosses the Tarn valley in a single sweeping span that often sits above the morning cloud layer, giving it the surreal "floating" appearance the title references. Designed by structural engineer Michel Virlogeux with architect Norman Foster, it was completed in 2004 after just three years of construction, thanks to a clever hydraulic launching technique that slid the deck sections out from both sides of the valley until they met in the middle.

A short explainer on it should at least touch on the pier design, the deck-launching method, and the wind-resistant aerodynamic profile — all worthwhile engineering topics. Caveat: the channel has only 14 subscribers and the video is likely a brief Shorts-style overview, so treat this as a starting point rather than a deep dive. If it hooks you, the longer documentaries on the viaduct's construction are well worth a follow-up search.