Tulum's cenotes prove that not all swimming holes are the same. Whether you want to relax or explore history, there's an option for you in this part of Mexico.

The small creatures look like oval mini-sailboats that can grow up to 4 inches long. Their gelatinous bases can range in color from vibrant blue to deep purple, and they have transparent ...

The small creatures look like oval mini-sailboats that can grow up to 4 inches long. Their gelatinous bases can range in color from vibrant blue to deep purple, and they have transparent triangular ...