Although all five Caspian littoral states signed a convention in 2018 settling such disputes, Tehran is yet to ratify the document - which also holds up Ashgabat's plans to build a pipeline across the sea to ship gas to Europe.

Source: https://gazette.com/news/us-world/israel-cements-ties-to-turkmenistan-on-irans-border/article_cbbdcffa-abf7-5850-90aa-1fbc4b63e4b2.html

Oahu and Maui are two of the most prominent islands in the archipelago, located fairly close together yet still separated by significant distance across the sea.

Source: https://www.hawaiistar.com/can-you-see-maui-from-oahu/

Traditionally, teams go across the sea ice on Norton Sound and Golovin Bay, but winter storms have pushed some of that ice out.

Source: https://alaskapublic.org/2023/03/03/the-2023-iditarod-starts-this-weekend-heres-what-to-know/

Underwater volcanoes have left behind unique lava creations clustered across the sea floor.

Source: https://observer.com/2023/01/the-worlds-best-spots-for-snorkeling/