"You can't come in"

"Go away," said the guard when I stepped inside the gate.
"I am waiting for my friend," I replied.
"Okay, then go away."
"But when she comes, we want to see inside."

"You can't.  It's prayer time."
"Oh." Set back but not giving up, I said, "Then we won't go see inside the masjid, we will only go in the park."
"You can't."
"Why not?"
"It's closed."
"But why?"

"The wall has a crack in it and the park has been closed to the public."
"Is the other gate open?" Persevering on...
"No gate is open."
"Can you unlock it?"
"It is not possible."
"Can you open it after prayer time?"
"No, this is not possible."

Bummer.
I tried.  I tried really hard to see Sher Shahi and the Lal Darwaza, but I did not succeed.

Rajon ki baoli

You can find Delhi's prettiest baoli in the archeological park of Mehrauli.

Rajon ki baoli was built in the early 1500s.
There's no water left, but it's well preserved and protected by a guard (who probably sleeps for most of the day).  It's possible to climb up and down all its passageways.

Rajon ki baoli means the "mason's well".  Some say it's called this because of the masons who would have needed water while constructing the mosque, tombs and guesthouses alongside the well.  But others argue it's unreasonable to think it was used by construction workers, due to the status of this particular well.

Maybe it was called that just because there were so many masons hanging around during the time of its construction.

Who knows.  The full reason is lost to history.

But I'm glad the baoli is not lost.