もし機会があれば、その街初の博物館を訪れるでしょう。

If I had the chance, I would visit the city's first museum.

天気が良ければ、彼らは自然を楽しむために国立公園を訪れるでしょう。

If the weather were nice, they would visit the national park to enjoy nature.

もし機会があれば、あなたたちは国立博物館を訪れるでしょう。

If you had the opportunity, you would visit the national museum.

もし機会があれば、私たちは休暇中にその古い城を訪問するでしょう。

If we had the opportunity, we would visit the ancient castle during our vacation.

もし機会があれば、あなたは歴史に満ちたその古城を訪れるでしょう。

If you had the opportunity, you would visit the ancient castle full of history.