It's been a while since we came to this park! When it's near as well.
この場合の 久しぶり は it's been a while などと表現
出来ると思います。
しばらくだね と言った感じです。
しかも近いのにねと言う感じで when it's near as well と
言ってみても良いでしょう。
「ここ久しぶりに来たね!家から近いのにね」
"It's been a while since we came here! When it's near from home as well"
We haven't been to this park for a long time even though it's so close to our house.
この場合、次のような言い方ができますよ。
ーWe haven't been to this park for a long time even though it's so close to our house.
「家からすごく近いのに、この公園にしばらく来ていなかったね」=「家からすごく近いのに、この公園に来るのは久しぶりだね」
ご参考まで!