This picturesque medieval monastery guards a small trove of historic treasures.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A tiny church on a man-made island in the Adriatic.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.