As plans are revealed for the first underwater hotel, here are the top 10 most unusual hotels around the world

Word is out that Dubai could be set to host the world’s first underwater hotel.

This isn't the first, and it certainly won't be the last bizarre idea to hit the hospitality scene.

We take look at the most spectacular hotels around the world to celebrate the architecturally weird and wonderful, from a troll-hideout in Belgium to an authentic military prison in Latvia.

Click on the image to launch our gallery