One quick question on the pasyt/present and future tenses.
 

I'm currently practicing my Japanese.

One part I'm writitng is,

Oteru to Jinjou o shimashita. Omoshirou (sou) katte kara.

Would the sou in brackets work in that sentence to translate to,

"I went to a temple and shrine, because they sounded/looked interesting" ? Or would I have to add some sort of particle to join them up?

X Oteru (wrong)
O Otera (correct)
X Jinjou
O Jinja
suru = to do, shimashita = did

So it should be as follow:
Omoshirou sou ni mieru kara, Otera to Jinja ni ikimashita.
or,
Otera to Jinja ga omoshirou sou ni mieru kara, mi ni ikimashita.

Arigatou Gozaimasu!

Cheers!

お寺と神社が面白そうですから、そこにいきました。
otera to jinja ga omosirosou desukara, soko ni iki masita.

The "sou" already has a meaning of looked/sounded, so "mieru" is not nessary.
And you could use the " soko" to instead of repeating "jinja and otera", that's mean "there".