The coolest thing ever

[mine]

What is the coolest thing ever in half life 2 alpha/beta?

[Витой]

The coolest and most interesting thing is that we can dig it, like archeologists.

[mine]

The coolest and most interesting thing is that we can dig it, like archeologists.

[EvilGeniusRo]

The coolest and most interesting thing is that we can dig it, like archeologists.

2deep4me but that sums it up pretty well. Always loved to see earlier iterations of the maps that are in the final version of Half-Life 2 
Some good examples https://vk.com/beta_project?w=wall-102159203_6985 , https://vk.com/beta_project?w=wall-102159203_6938 and https://vk.com/beta_project?w=wall-102159203_6935