While it may be a little more expensive to travel out of the country than to stay in the United States, Ibiza, Spain, may just be worth the trip. This exotic island off the coast of Spain is well-known as one of the best vacation spots for singles in the world. From wild foam parties to sandy, white beaches where singles gather to tan, swim and surf, Ibiza is an entertaining destination. Ibiza is famed for its nightlife and is known to have the biggest nightclub in the world, Privilege.