"Fairly concretely: hypokeimenon is the presence [Anwesen] of an island or the mountains (ein Gebirg), and when one is in Greece, this Anwesen catches the eye [springt ins Auge]. Hypokeimenon is, as a matter of fact, the being in its lay/position [das Seiende in seiner Lage], so as it shows itself [so wie es sich sehen laesst], that is: that, which is there [da], before the eyes, how it, from itself, protracts itself [wie es da von sich selbst her sich hinzieht]. That's how the mountains lie in the land and the island in the sea."

Heidegger was obviously under the impression that inert objects were capable of intentionality and children's hide and seek games.

Ignoring for a moment the gaucherie of depicting  "presence” or "Anwesen" or "hypokeimenon," [rather than that which is present,] as catching the eye to which we will return in a moment - - let's examine what the wily old cognitive confectioner was  muttering about.

The marzipan of anthropmorphism is further spooned onto this incredible ontological confection with the attribution of the ability of a mountain to "show itself." and even "protract itself." 

Now this is a phenomenon that the numerous mountains that I have seen all over the world plainly didn't have as a feature of their ready-to-handedness, or their present-at-handedness either for that matter.  Perhaps the topographical  pop-up and pop-down feature, and hide-and-seek property is only a prank of German mountains, or some special mountains hidden away [or perhaps hiding themselves?] in Greece specially to ‘catch the eye’ of visiting trannie Hellenophiles which only Heidegger has seen?

As one approaches the town of Ulverston in the British Lake District, [birthplace of Stan Laurel of Laurel and Hardy fame] there is a lighthouse structure on a prominent hill. It is known locally as "The Pepperpot."

Due to the topographical nature of the land and the motor road that approaches it one experiences the optical illusion of the Pepperpot slowly sinking into the ground on the hill above until it is no longer visible. 

It is a feature that is very popular with children who are very amused at the lighthouse apparently hiding itself from view.  The truth of the matter (which the children and Heidegger don't understand) is of course that the Pepperpot isn't and has no intention of hiding itself, for it is the changing position of the perceiver in relation to the Lighthouse that creates the misconception.  The Pepperpot doesn't hide itself as we approach, or protract itself as we [looking backwards] depart.  The Pepperpot and the Gebirg [that which is present] doesn't catch the eye [springt ins Auge].

OUR EYES CATCH  IT!