Great Blue Hole (Belize) The Great Blue Hole is one of the most famous underwater sinkholes in the world and an iconic exploration site for divers. This marine wonder is located off the coast of ...

Last week, Cem Kinay opened a luxury 13-room hotel inside an 800-year-old Seljuk caravanserai -- an ancient roadside inn -- that sits on the brink of Turkey's oldest and most famous sinkhole.

Time, water, and geologic forces have converged to create underwater sinkholes where oxygen-poor and sulfur-rich groundwater support prolific microbial mats resembling life on early Earth.

The famous hole in the road is no more and the celebrations have begun. The people of Hebden Bridge and Todmorden have taken to social media with jokes and tongue-in-cheek comments directed at their ...