I've come across on the internet, some awfully bizarre hotels and hotel rooms. I don't think that any of them have piqued my interest as far as staying there is concerned. However, I was actually amazed at the obvious diverse tastes of people who visit these places, and the totally out-of-this-world way in which some of the rooms were presented.
If you were given the opportunity to stay in any of these hotels or rooms free of cost, would you dare?
Hydropalace, China
This hotel is anchored in the Yellow Sea. You get there by boat and enjoy a luxurious stay in one of the world's most bizarre hotels.

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Drainpipe Hotels

In Germany you could rent one of these hotel rooms made from drain pipes (that's you, down the drain then).
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Asakusa Capsule Hotel

This capsule hotel is in Japan and offers cheap overnight stay for people on the go. They remind me of ovens.
Beckham Creek, Cave Haven

A luxurious cave hotel located in Arkansas, USA
Woodpecker Hotel in Sweden

This tree house hotel stands 13 meters (42 feet) above ground. It lies in a 130 year old oak tree and comes with a kitchen and a toilet too!
The Cage Room

This is a hotel room with two cages, built with the idea that guests can put on "cage shows" for each other.
The Jail Room

A room fashioned after a jail cell. Guests are encouraged not to book out, but to break out at the end of their stay.
Sand Hotel at Weymouth Beach in England

This is just a structure with no roof. I wonder what happens when it rains.
The Wrapped Room

If you love CSI, this one if for you. This hotel room is structured to look like a crime scene that has been wrapped by investigators.
Flying Hotel Room

The floor slants, the wardrobe comes out of a wall and the bed is suspended. If you're air-bound crazy, don't miss out on this one. Just don't' forget and swing your legs off the bed when you wake up in the morning.
Ariau Towers Hotel in Brazil

In the treetops of the Amazon Rainforest, you will find this strange hotel perched 80 feet above the ground. The rooms stand on stilts and enjoy the fresh, clean air that only the Amazon can provide.
Dog Bark Park Inn

Dog lovers are encouraged to stay with their dogs in this B and B in Idaho, U.S.A.
So, here is your choice of the world's coolest hotels and hotel rooms. Is there any that tickles your fancy?