The webpage contain the following:

Treasure of the Pirates!
It should in some of this (or hidden) island!

Hint: you need a map of this place to find it!

```
Island #0
Island #1
<SNIP>
Island #9998
Island #9999
```

We are looking for the map. We check robots.txt: it contains: Sitemap: /treasuremap.xml

The file /treasuremap.xml contain the location of the "treasure":

```
<urlset>
<url>
<loc>7BmqJfhWhEa30NeVj7j2.html</loc>
<lastmod>2005-01-01</lastmod>
<changefreq>monthly</changefreq>
<priority>0.8</priority>
</url>
```
</urlset>

And the "treasure" contain the flag: flag{tr3asur3_hunt1ng_fUn}