Copy and paste this HTML into your website code:
<iframe src="https://hiiker.app/trails/switzerland/seelisberg/auf-dem-forster-trail-um-seelisberg/iframe" title="Auf dem Förster-Trail um Seelisberg | Hiiker" referrerpolicy="origin-when-cross-origin" style="width: 100%; aspect-ratio: 4/3; max-width:800px;"></iframe>