Is Carribean part of Mexico?

The Caribbean Sea is a sea of the Atlantic Ocean in the tropics of the Western Hemisphere. It is bounded by Mexico and Central America to the west and southwest, to the north by the Greater Antilles starting with Cuba, to the east by the Lesser Antilles, and to the south by the northern coast of South America.

Are there beaches in Mexico connected in Carribean?

The Southeast coast of Mexico (Quintana Roo) is a part of the Caribbean. Cozumel, Cancun and Riviera Maya are popular Mexico destinations on the Caribbean coast of Mexico.