2. Suối Tiên Cultural Amusement Park (Hồ Chí Minh City, Vietnam)

In contrast to Haw Par Villa, Suối Tiên Cultural Amusement Park does feature elements that you'd expect to see at a theme park. This includes an impressive selection of roller coasters and water rides, along with a zoo hosting more than 1,500 crocodiles. However, it also doubles as a Buddhist religious exhibition - and that means a chance to find out what will happen to you if you stray from the path of righteousness.

One of the park's headline attractions is Unicorn Palace. The name conjures up all sorts of wonderful images of a Disney-style castle populated with friendly mythical creatures. The reality couldn't be more different.

It all starts innocently enough. Guests board inflatable rafts, which emerge into a colorful jungle complete with miniature volcanoes and chattering apes. An It's a Small World-style cheerful tune plays as the boat drifts pasts tableaux of cavemen, Chinese warriors and finally into the modern age.

Then the screaming begins.

Yes, Unicorn Palace is actually a boat ride through the five stages of being - life, death, reincarnation, hell and nirvana. It's the hell part that really stands out, though - with the Small World-like puppets being brutally tortured in all manner of inventive ways.

3. Wang Saen Suk Monastery (Thailand)

Perhaps we should expect a theme park at a monastery to be a little bit out of the ordinary. And the Wang Saen Suk Monastery doesn't disappoint, with its cheerfully-named "Hell Garden".

Of course, there is real religious substance behind the attraction. Naraka, usually translated as "hell" or "purgatory", is the name given to the world that people go to when they die, to pay their respects to Phya Yom (the death king). Four celestial beings check through their life, looking for good and bad beeds. The good deeds are recorded on a gold plate, while the bad ones are recorded on a piece of dog skin.

If you've done good, you can look forward to going straight to heaven. If you've done bad, you can look forward to this:

There are a number of similar hell gardens in Thailand. Bring a picnic.