Reachable by water taxi, El Arco ("The Arch") will enchant you. Here, impressive arches naturally formed from rock frame white-sand beaches and crystal-blue waters. Snap a pic of the arch, and catch a glimpse of the sea lions that often pop up to get some sun on the rock formations.
This same water taxi can also drop you off at romantic Playa del Amor — Lover's Beach. Watch the clear waters of the Sea of Cortez crash against the massive eroded granite rocks that rest on the shore.