If "exotic" refers to something foreign and unusual:
* Foreign
* Alien
* Unfamiliar
* Outlandish
* Distinctive
* Unique
* Rare
* Extraordinary
* Ethereal
* Mysterious
* Intriguing
If "exotic" refers to something luxurious and appealing:
* Opulent
* Lavish
* Elegant
* Sophisticated
* Splendid
* Dazzling
* Glamorous
* Alluring
* Enchanting
* Captivating
If "exotic" refers to something unusual and beautiful:
* Stunning
* Spectacular
* Breathtaking
* Magnificent
* Striking
* Eye-catching
* Show-stopping
If "exotic" refers to something with a strong, distinctive smell or taste:
* Spicy
* Aromatic
* Flavorful
* Intense
* Pungent
* Heady
The best alternative will depend on the specific context of your writing.