More people are electing to vacation in pod hotels.

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You read that right. Pod hotels.

These unusual hotels are pretty much what they sound like: Lodging made up of small pod rooms that fit only the necessary amenities — a bed, lighting, and some storage space. Most of them have communal bathrooms, and some hotels have other perks like spas and cafes.

The trend was born out of Japanese capsule hotels — extraordinarily tiny rooms built into small fiberglass boxes. The very first one was the Capsule Inn Osaka that opened in 1979. Staying in rooms this tiny may not be for everyone, but their popularity stems from a growing desire for cheap lodging that provides a bit more privacy than the traditional hostel.

Here's a look at 8 of the most innovative pod hotels from around the world:

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