The best holiday I have ever had.

It was two years ago, and I was 13 years old. I went on a camping holiday in Kandersteg, Switzerland. I went with some friends and we stayed in a campsite. People don't usually like this kind of holiday but I love it. In that campsite, there were people from all around the world such as Brazil, Denmark, and the United States.

 
Even though it was July, it was still cold in Switzerland so I had to bring my jacket, scarf, and gloves. It was really cold and it rained everyday so it was a good idea to take a raincoat too.
While we were there, we went hiking and climbed a mountain (a huge cow was chasing us while we were climbing it, and I was very tired, but I ran until I reached the refuge). We woke up very early that morning and saw the dawn. It was high altitude so we could see the whole valley, the rivers, the lake, and a little town far away. Switzerland has very good landscapes and I took really good photos. By the end of the holiday, we had done lots of activites but I kept wanting to do parachuting and bungee jumping, I couldn't do it because I was too young, but maybe next time. I enjoyed my holiday because it was amazing; I can't describe it. I long to go back someday.

The best holiday I have ever had.

It was two years ago, and I was 13. I went on a camping holiday in Kandersteg, Switzerland. I went with some friends, and we stayed in a campsite. People don't usually like this kind of holiday, but I love it. In that campsite there were people form all around the world: Brazil, Denmark, US...
It was July, but in Switzerland it's cold so I had to take my jacket, my scarf and some gloves. It was really cold, and it rained everyday so it was a good idea to take a raincoat.
While we were there we went hiking. We climbed a mountain (a huge cow was chasing us while we were climbing it. I was very tired, but I ran until I reached the refuge). We woke up very early that morning so we saw the dawn. It was a high altitude so we could see the whole valley, the rivers, the lake, and a little town far away. Switzerland has very good landscapes, and I took really good photos. By the end of the holiday we had done lots of activites, but I kept wanting to do parachuting and bungee jumping. I couldn't do it because I was too little, maybe next time. I enjoyed my holiday because it was amazing. I can't describe it, and I long to go back someday.

The main problem is how you seperate the sentences. You either need to use a period and start a new sentece, you a comma and a conjuction like "and" or use a semicolon. I didn't include an example with the semicolon because it is best used when you want to highlight some contrast between the two sentences.