How do I return to beneath the sphinx

[Fjolde]

As the title says. I'm trying to get some relics I missed and I can't find a way back down. I've looked all over (I think) and I've watched videos of when people leave the sphinx but it's just a cut scene and where you stand after is no indication of where you came out.

Can I go back under the sphinx?

[Supermarine]

The entrance is on the right side of the Sphinx, right in front of the paw. It's the place where you find Gina, and you can access the catcombs from that side, or from the one you exit from earlier.