Have you been to Iceland? I just booked tickets to go to Iceland in the spring and so here's a travel guide to help you too. You're not going to Iceland? Well maybe this list will help you decide that you should go.
1. Blue Lagoon
There's a spa here too. You had me at spa. Learn more: http://www.bluelagoon.com/
2. Gullfoss
It's a giant, beautiful waterfall. Check out its website: http://gullfoss.is/
3. Gold Circle
It's a popular tourist route in southern Iceland. It covers about 300 kilometres/190 miles from Reykjavik into southern lands. You'll find all the tourist-y things here.
4. National Museum of Iceland
Located in Reykjavik, you can learn all about this beautiful country you are visting! http://www.thjodminjasafn.is/english
5. Árbæjarsafn
An open air museum, it provides insight to how people have lived in Iceland. Also, no advanced booking needed! http://borgarsogusafn.is/en/arbaer-open-air-museum
6. Perlan
A fine dining restaurant. A restaurant you should 100% eat at. Learn more: http://www.perlan.is/?lang=en
7. Askja
It's a caldera and central volcano in the Dyngjufjöll mountains. You can also catch a tour that goes by this.
8. Súlur
Located in the town-mountain of Akureyri, this is a popular walking and hiking trail that leads to this beautiful mountain.
9. Fríkirkjan í Reykjavík
There's always so much history inside of a church. It's a wonderful way to understand a culture.
10. Jökulsárlón (The Glaciar Lagoon)
This is a large glacial lake near the edge of Vatnajökull National Park. http://icelagoon.is/
So between the mountain hikes, glaciers, waterfalls, and museums, I'm sure there will never be a dull moment.