Erawan waterfall
Erawan is the most beautiful waterfall I have seen so far. It has 7 levels. Each level has an own waterfall. Going up they seemed to get prettier each time. I loved the bright blue color of the water. Although I really wanted to get in the water, I also wanted to get all the way up.
I was told it would be a little bit more difficult to get from level 6 to 7. As I kept in mind that Thai people sometimes exaggerate about difficulty of something I was surprised that it was indeed a bit more difficult to get there. It is not that tough, but there is no path, it’s a bit rocky and steep. I wouldn’t recommend pregnant lady’s, people carrying babies or toddlers and not too mobile people to go up to level 7. For those who can get all the way up, you should do it, it’s really worth the climb!
Erawan National Park is open for visitors all year and generally very busy during the weekends. The entrance fee is 300 baht for foreigners.
Bare in mind that food is strictly forbidden beyond the 2nd tier. Visitors must pay a 20B fee per bottle of any drinks which can be refunded when the bottles are returned.
Don’t forget to bring your swimming suit, because the water is very inviting. 
During the annual Songkran Festival 13-15 April, the waterfall tiers turns into a celebration place with water fights. It is not recommended to cary non-waterproof electronic equipments like sensitive cameras or mobile phones during the festivities.