Tourist: noun and adjective forms

There are two adjective forms of tourist. The first is the noun tourist used as an adjective in front of another noun, as in:

• Tourist attraction
• Popular tourist destination
• Tourist trap

The other is the word touristy, which is an informal and slangy word, with negative connotations. It can be used in contexts like these:

• Touristy souvenirs 
• Try to avoid the touristy areas. 
• The area around the square is very touristy.

As you can see in the last example, touristy does not need to be used in front of a noun.