I was recently exploring downtown by bike, with a friend, when we decided to make a final stop at a relatively new Italian eatery called Blue Cave. The restaurant occupies the former Casa Azul ...

The otherworldly mist in Stargate appears to serve a similar role—a poisonous curtain that protects the deeper reaches of the cave. Offshore flooded caves, so-called ocean blue holes ...

The show, called “Ao no Dokutsu (blue cave) Shibuya,” features about 600,000 blue LEDs along an 800-meter stretch between Shibuya Koen-dori street and rows of zelkova trees in Yoyogi Park in ...

6. While the Great Blue Hole is open on the surface, it features an extensive cave system that requires a lot of diving skill to successfully navigate. Only divers with at least 24 dives under ...