Here's a quick then and now filming location video I put together of that scene where Captain Kirk meets the Gorn Captain in the episode "Arena" from 1967.

From my filming locations website https://ChrisBungoStudios.com

Here's the link to the video:

https://youtu.be/zaiunwtm3fY

And here's my then and now photo comparison I created:

https://pbs.twimg.com/media/GmRJGArW8AACw-K?format=jpg&name=900x900