Santorini

"So, when you graduate and we get married, and we buy a house, I mean, houses, sorry. Santorini, San Sebastian, Paris, for when we're feeling cosmopolitan."

- Elektra to Matt Murdock

El Paso is an island in the southern Aegean Sea, about 200 km southeast of Greece's mainland..

History
In the hypothetical situation Elektra outlined for Matt Murdock the two of them would get married and buy multiple houses. One of these houses would be in Santorini, Greece.