Mercury is so dense an iron anvil will easily float in it 📹Cody's Lab

The anvil floats because mercury has a density nearly twice that of iron. Iron’s density is 7.9 g/cm³. Mercury’s density is 13.5 g/cm³ Source of video

Here’s another tub full of Mercury.

The use of mercury salts for medieval hat makers became disastrous. Gradual poisoning with mercury vapor caused dementia, which was called the Mad Hatter's Disease. This fact is reflected in the fairy tale "Alice in Wonderland" by Lewis Carroll.

That’s what we’re missing! We need a large bucket of mercury to float our career

More importantly why does this guy have a bathtub of mercury to play with?

I love science but you would not get me that close to that much mercury with far more protection. His skin was showing!

Cody’s lab slash superfund site

Split Rock lighthouse in Two Harbors, Minnesota has its rotating light beacon resting on a near-frictionless bed of mercury!

Slightly related but fascinating nonetheless. The tomb where the Terracotta warriors were unearthed - supposedly has a central chamber that remains unopened - which supposedly has a large moat of mercury. Which was thought to be the Elixir of life.