をお見せしましょう

let me show you

→ を
phrase Rare #45,861
let me show you A polite, humble way to offer to show something. The thing being shown comes before を; who you are showing it to is often understood from context.
JA: 新しい写真をお見せしましょう。
EN: Let me show you the new photos.

家の中をお見せしましょう。

Let me show you around the house.