> For the complete documentation index, see [llms.txt](https://holacity.gitbook.io/hola-city/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://holacity.gitbook.io/hola-city/grey-structures/about-grey-structures.md).

# About Grey Structures

<figure><img src="/files/TrFHweoUMAFwEMRjmosl" alt=""><figcaption></figcaption></figure>

These structures have HOLA earnings on a daily basis.

Each structure has its own unique earning system.

Sales prices or who they belong to are seen on the map.

The owner can sell it at any time at the price he has determined.

There are a limited number of gray businesses and allow you to earn a high degree of HOLA profits.

The game will periodically introduce new gray businesses, but they will be very few.