If you haven't yet seen the Human Bodies exhibit, it's a definite must-see, especially if you have a few days in Barcelona. This scientific and intriguing attraction provides a truly unforgettable experience, where you'll see the inner workings of the human skeletal system on a level you've certainly never seen before!

This is an incredible learning opportunity and a great thing to do in the city. The exhibition includes more than 150 individual organs in 12 bodies. From the development of humans to digestion to the nervous system to the conception of a new being, this exhibit covers it all and shows you how the body works.

The "Human Bodies" exhibit — Photo courtesy of Human Bodies: The Exhibition

It's also an incredible eye opener for smokers and alcohol drinkers. If you've ever wondered what the affects are on your lungs and liver, there's no better way to gage than by seeing it first-hand and looking inside your body.

A special feature that Human Bodies is featuring this time around is the use of plastination. This is an advanced scientific technique that makes it possible to preserve the complete organs and bodies displayed in the exhibit without their original appearance undergoing any changes.

The technique of plastination is the results of years of research and consists of a process lasting weeks or months, where the liquids and part of the adipose tissue in the organs are slowly replaced with a polymer, under vacuum and freezing conditions.

Human Bodies is unique in that the exhibition has been carefully selected by their teaching team, and they've paid special attention to the scientific and educational interests, in order to help people as best as possible gain a genuine understanding of what is really hidden beneath our skin.

The exhibit's showcase in Barcelona has been running since April and will go through Oct. 12, 2014. It's located at Cupula de Las Arenas, and tickets can be purchased online or at the exhibition office. It's situated right on the edge of the Raval neighborhood in Ciutat Vella and just a short walk from the beach.

Opening hours include 10 a.m. to 8 p.m. daily, and it's open all day without interruption. The last entry is at 8 p.m., so the actual exhibit closes at 9 p.m.

It's recommended to take an hour for the visit, as there's a lot to see. You can easily spend longer, but at least an hour will give you a good feel. After you've finished visiting the exhibit, stroll through the Raval to Poble-sec or head down to the port and glance at the new yacht area.