Salt Point State Park, California

These honeycomb-like formations are called tafoni (Italian for caves) and are caused by salt weathering and a recurrence of wetting and drying over a long period of time.

Vila Nove de Milfontes, Portugal

Bowling Ball Beach, California

These mysterious boulders are each about a meter in diameter.

Pescadero, California

La Jolla, California

La Jolla, California

La Jolla, California

Schooner Gulch, California

Giant's Causeway, Ireland

These basalt columns were formed 50-60 million years ago and are, essentially, dried lava.

Warwariki Beach, New Zealand

This is the most beautiful beach I've ever been to.  Located on the northern-most tip of the south island, this beach is *wild*.  It was windy as all get out every time I went.  The hike to the beach is spectacular, with rolling green hills and sand dunes.