Here's what the Kaaba looks like from inside

[Asian.Century]

Indeed beautiful. Lucky ppl can enter the Kaaba.

 

[PakSword]

You are right, the place is originally built by Prophet Ibrahim.

"And remember Ibrahim and Ishmael raised the foundations of the House (With this prayer): "Our Lord! Accept (this service) from us: For Thou art the All-Hearing, the All-knowing."

— Quran, Chapter 2 (Al Bakarah) verse 127[26]

Don't quote the statement without understanding it.