On one of the endless list of 'most beautiful sights/places on Earth' that you'll find on the internet, there is almost always a picture of a crystalline beach hidden inside a crater, like a jewel inside a treasure chest. This is the place. Cutely called Playa de Amor (Beach of Love), the beach is no natural creation - it was formed when a bomb was accidentally detonated here by the military. Now, it is only accessible during low tide. The rest of the time, though, the Marietas islands are no less inviting. Formed by volcanic activity, now uninhabited, the island is a wealth of natural wonders - marine animals, birds. It's UNESCO recognised biosphere reserve now. The only way to get to the island is by hiring the services of one of the many authorised tour companies.

• Do not attempt to get to the island on your own boat.
• The duration of visit given here includes travel time on boat, which is one hour from the city, each way.
• Bring your own snorkelling gear.
• Reserve your tours early - it's a highly popular destination, and frequently sold out.

• Though different tour companies charge different prices, USD 70 is a good average estimate of a tour package to Marietas Islands.

• By sea, with a tour company like Vallarta Adventures.

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