What are the correct translations

1. they want to return to new york someday

quieren regresar de nueva york algun dia
quieren regresar a nueva york algun dia
quieren regresar nueva york algun dia
quieren devolver a nueva york algun dia

2. the pictures are taken by a photographer

los fotos son sacados por un fotografo
los fotos son sacadas por un fotografo
los fotos eran sacas por un fotografo
los fotos saco de un fotografo

1: Quieren regresar a Nueva York algún día.

"De" means of or from (as opposed to "a" meaning at or to), so option one would not make sense.

Option three gets rid of the preposition completely, which is incorrect.

Option four uses the verb "devolver", which would be the incorrect translation in this case.

2: Las fotos son sacadas por un fotógrafo

My best guess is that 2 is correct and that you just mis-typed it. La foto is a feminine word, so it wouldn't make sense to use the pronoun "los".

Option one is incorrect because the adjective "sacados" describes something masculine, and la foto is feminine.

Option three is incorrect because "eran" is the imperfect tense conjugation for ser, and the original sentence is using present tense.

Option four is incorrect because firstly, the verb ser was completely removed, as if saying "the pictures taken". Second, "de" means of or from, and not by. "Por" means by.

Hope this helped!

lo que mas me gusta hacer en una excursión a un parque nacional es observar todo el paisaje y tomar muchas fotografías para mostrárselas a todos mis amigos y familiares.

tal vez lo que menos me gusta es que tenemos que caminar demasiado