There's something so enchanting about this island, which boasts an impressively preserved Gothic-style monastery that dates back to medieval times, as well as a small town that was built within its walls. Recently, the UNESCO World Heritage site has been in the news for issues surrounding how it treats tourists. Overcrowded shuttle buses, low-quality restaurants, museums, and shops, and a lack of information for visitors are some of the most commonly cited problems.

However, the site still makes for a worthwhile visit. Standing at an altitude of 262 feet, the monastery is made of four crypts that were built directly into the rock. The best part is catching a glimpse of the structure as you make your way across the soft sand at low tide.