If you go into third person mode, you'll notice you person is sitting, because the player is "mounted" onto the block. However, it looks seamless in first person mode.
This is an example of a bigger elevator type.
...lift a lake! Don't try this at home unless you want to wait 10 minutes for the lag to stop. It literally froze my window for THAT LONG!
...And don't lift a mountain either. Personal experience there too.
The block looks a bit bright because it's an entity. It also means you can fall through it.
After 10 minutes of lag, the lake was completely lifted 50 blocks into the air. The lake's volume was 500-1000+ blocks.