Found this red mark in a Japanese cave, what does it mean?

[Hery Pasaribu]

beberapa hari yang lalu saya memasuki goa jepang. saya menemukan ini.
di bagian lain saya melihat potongan .
ada yang tau tentang tanda itu?

 

[pepperj]

beberapa hari yang lalu saya memasuki goa jepang. saya menemukan ini.
di bagian lain saya melihat potongan .
ada yang tau tentang tanda itu?

Here is the English version from Indonesian.

 

[Charlie P. (NY)]

Is this cave in Japan? If not, it is some other nation's cave as people make tunnels but nature makes caves.

Likely a warning/clearance mark so they didn't bump their heads there while carrying chests full of $1,000,000 bank notes to be left behind for decades.

 

[joethehunter]

Pictures are no good my friend

 

[villagenut]

Dang Joe, you didn't last long

 

[Hery Pasaribu]

beberapa hari yang lalu saya memasuki goa jepang. saya menemukan ini.
di bagian lain saya melihat potongan .
ada yang tau tentang tanda itu?

Video beberapa hari yang lalu. Akan mencobanya lagi, saya senang melihatnya. Butuh saran dari siapapun, terima kasih atas perhatiannya

 

[Hery Pasaribu]

Apakah ada gambar yang jelas tentang ini.

Saya akan mengirimkan video singkat kepada Anda, terima kasih

 

[Hery Pasaribu]

Pictures are no good my friend

I will send you a short video, thank you

 

[Hery Pasaribu]

Is this cave in Japan? If not, it is some other nation's cave as people make tunnels but nature makes caves.

Likely a warning/clearance mark so they didn't bump their heads there while carrying chests full of $1,000,000 bank notes to be left behind for decades.

it's not just about the money guys, it's more than that

 

[ticndig]

Dang Joe, you didn't last long

that's what she said.

 

[cw0909]

Video beberapa hari yang lalu. Akan mencobanya lagi, saya senang melihatnya. Butuh saran dari siapapun, terima kasih atas perhatiannya

in the 2nd video that 50 seconds, I hear a motor sound car/bike @ about 30 seconds
are you under a road