Copy and paste this HTML into your website code:
<iframe src="https://hiiker.app/trails/england/surrey/reigate-heath-and-mills-and-pillboxes-walk/iframe" title="Reigate Heath and Mills and Pillboxes Walk | Hiiker" referrerpolicy="origin-when-cross-origin" style="width: 100%; aspect-ratio: 4/3; max-width:800px;"></iframe>