Read the text and fill in the gaps

• extreme ironing
• tree camping
• geocaching

There are different extreme sports that people can do in the air, underwater or in the mountains. Some people like paragliding or diving while others are rock climbing lovers. Still, there is one more activity which can unite all people while doing different dangerous things. This activity is called [ ]. Yes, a usual household appliance is taken to unusual and sometimes even dangerous places for making clothes flat and smooth.

Here is another unusual thing that can begin as something common. Your friends have invited you to spend time in the wild. You take a tent, a sleeping bag, a torch, warm clothes, some food and other necessary things. You are going to the woods dreaming of fresh air, bonfires and stargazing. And when you come, you find out that you're not going to sleep on the ground... It turns out to be a [ ] holiday.

Are you good at using GPS? Do you like looking for hidden things? Then [ ] can become your cup of tea. This is a tourist game whose aim is to find hidden locations made by other "treasure hunters". Most often, such places are made in locations which have a natural, historical, cultural, geographical value. Are you interested? Just register on a special website, get a GPS device and off you go!