Our guides in Kverkfjöll offer glacier walks during the summer. Up in the higher peaks there is a geothermal area called Hveradalur which is surrounded by glacier ice and the colour display is amazing. The hike takes about 10 hrs and in good weather conditions participants could be able to see Iceland's highest mountain peak Hvannadalshnjúkur, Bárðarbunga which is a volcano located under the glacier, last time it erupted was from August 2014 untill February 2015 and Herðurbreið the queen of all mountains, to name just a few.
You can see more information about the tours here
Here are few photos that were taken from a hike in July: