One example of anchors in Joomla!:

When using external link

<a id="flights" href="http://milosev.com/2015-01-23-20-08-55/adventures-planning?id=119#flights">Flights:</a>
POI: id="flights"

When using internal link:

<a href="#flights">Flights:</a>
Where anchor looks like:
<div id="flights">Flights:</div>