Haiti is located in the Caribbean Sea.

Explanation:
Haiti is a country situated on the western part of the island of Hispaniola, which is the second-largest island in the Caribbean Sea. The island of Hispaniola is shared by two countries, Haiti and the Dominican Republic.

The Caribbean Sea is a large body of water located in the western Atlantic Ocean, surrounded by the Caribbean archipelago. It is known for its beautiful tropical islands, warm climate, and stunning marine life. The Caribbean Sea is home to numerous countries and territories, including Haiti.

- Location of Haiti:
Haiti is positioned in the northern part of the Caribbean Sea, sharing the island of Hispaniola with the Dominican Republic. It is bordered by the Atlantic Ocean to the north and the Caribbean Sea to the south.

- Archipelago in the Caribbean Sea:
An archipelago refers to a group or chain of islands. The Caribbean Sea is dotted with many islands, forming an archipelago. Haiti is part of this archipelago, along with other countries such as Cuba, Jamaica, Puerto Rico, and the Bahamas.

- Importance of the Caribbean Sea:
The Caribbean Sea is a significant region due to its strategic location, rich biodiversity, and economic importance. It is a popular tourist destination, attracting millions of visitors each year who come to enjoy its pristine beaches, vibrant coral reefs, and diverse cultures.

- Haiti's geographical features:
Apart from its coastal location in the Caribbean Sea, Haiti is characterized by mountainous terrain, with the Massif du Nord and the Chaîne de la Selle being the two major mountain ranges. The country also has several rivers and lakes, including Lake Azuéi and Lake Péligre.

In conclusion, Haiti is located in the archipelago of the Caribbean Sea, which is renowned for its stunning islands, warm waters, and vibrant culture.