What are the best Full-day Tours in East Iceland?

The best Full-day Tours in East Iceland according to Viator travelers are: <br/><ul><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/South-Iceland/Small-Group-Day-Tour-to-Lakagigar-by-Super-Jeep-from-Klaustur/d24828-47688P2" target="_blank" rel="noopener">Small Group Day Tour to Lakagigar volcano by Super Jeep from Klaustur</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Skaftafell/Jokulsarlon-Lagoon-and-South-Coast-Private-Day-Tour-from-Reykjavik/d25390-19155P5" target="_blank" rel="noopener">Glacier Lagoon & South Coast. Private Day Tour</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/East-Iceland/Roundtrip-Transfer-Jokulsarlon-Glacier-Lagoon-and-Hofn-Airport/d22630-105182P64" target="_blank" rel="noopener nofollow">Roundtrip Transfer Jokulsarlon Glacier Lagoon and Hofn Airport</a></li></ul>