5. Algar de Benagil, Portugal
The southernmost corner of Portugal is known for its wonderful grottoes and amazing limestone caves which can be accessed by powerboats. The most famous of them all is Algar de Benagil which is also a postcard cave for Algarve featuring in most of the promotional materials. Picture-perfect and alluring, Algar de Benagil is not far from the famous Praia de Benagil beach. Boat tours are also available to reach various other widespread grottos.
