You stand atop an empty, enclosed tower. Other than the small balcony, the only visible exit is back down the golden-railed spiral staircase.

"Hmm. Downstairs then?" Titaani asks the others, leading the way. "Exploring the other tower sounds exciting."

Ben:

"We should check the spiral staircase in that other tower.  If it too is a dead end, we may need to go back outside and try the other double door to the west," suggests Ben, agreeing with Titaani.

Horatio follows closely behind the others, concerned that their presence had not gone unnoticed. 

The party descends the spiral staircase, through the grotesquely-decorated lower chamber, through the Hall of Stars, into a nearly-identical circular chamber on the other side, up a nearly-identical golden-handrailed spiral staircase, and into another empty room at the top of the tower. Like its counterpart to the east, a double door leads to a stone balcony that overlooks the palace garden. All remains quiet. 

Ben:

“Unless we want to climb up to that walkway to the circular garden, we should probably go back out and go to the double doors on the left,” suggests Ben.

"Hmm, climbing might be fun, but I'm more interested in finding more jewels," Titaani muses. "I think we should follow Ben's idea and go through the double doors."

"Dang. What's with this place...ooooooh, what's that?" Pud runs to edge of the peers over looking into the garden below surrounded by a smaller fence?

Perception check: 6

"Ah, I can't see much. Let's go down below and take a peek a down there before we go into the doors."

The party retraces their steps down the stairs, through the starry hall, and back out the main doors. It seals tightly behind you.

They gather near the large double doors to the west – quite large, but somewhat less ornate than the ones you just exited.

Peering below, Pud realizes he's looking at the same rose garden they spied earlier near the axe-in-the-stump, bordered by a bronze fence. Many of the rosebushes are covered in glistening spiderwebs. A statue of a prancing satyr rests at its center, holding a set of pipes to his lips.

Ben:

Seeing the door tightly shut behind them, Ben says, “Oops, we should have propped that open.”  

When they get to the next door, he tries it to see if it can be opened, or if they need to use the chime again.

Ben finds that the doors swing open easily – no magic chime is needed.

It appears to be a carriage house of sorts. Within, a crystal carriage is hitched to a pair of glass statues shaped like pegasi. Folded silk butterfly wings are attached to the roof of the carriage.

Another set of double doors leads north, and a second one east onto a balcony you spotted earlier over the storm vortex.

"Oh my goodness, it's so pretty!" Titaani runs over and inspects the butterfly wings of the carriage. "Do you think it can actually fly? Is it magical? How does this thing work..."

Arcana: 20

It looks arcanely functional to Titaani, although exactly how is still a mystery. The carriage’s doors appear to be sealed shut, with no handles, hinges, or keyholes. The carriage’s crystal structure is mostly opaque except for its windows. Looking through them, Titaani spots an ornate glass key resting on the seat inside. But to reach it, she'd have to smash a window or use magic somehow. It seats six, including the driver.

Pud walks over to peek inside the crystal carriage. He walks around the interior, taking note of the key.

"Dang! I wonder  they locked the key in by accident? Where's a locksmith when you need one.

Do you think the gems we found could activate this thing?"

He does another lap inspecting the carriage for any slots where one could inset a a magical gem.

Ben:

”I am guessing it is the queen’s personal transport,” says Ben, marveling at the exquisite craftsmanship, “Perhaps if we save her she will give us a ride.”

Ben moves to the door at the north and checks for traps or sound behind it.

Perception:  6

"A ride? Oh, that would be so cool!" Titaani chirps, moving to join Ben. "Then I'd really feel like a princess!"

She hands Pud the gems she collected. "We never know. You should give it a try!"

Pud circles the exterior of the carriage, but he cannot find any indentations or other places to fit a jewel, nor any other mechanisms, keyholes, or ways inside the crystal vehicle.

Ben examines the double door north. It is quiet, and there are no signs of surprises.

Ben:

Patiently waiting for the others to investigate the carriage, Ben asks, “Ready to continue?”

When everyone is ready, he opens the door.

"Doesn't look like these gems are gonna do anything here. I'll hold the gems in my satchel. Don't worry. I won't run off with them."

Pud secures the gems in his pouch and runs over to Ben.

Horatio joins Ben at the doors. "Is it bad that I kind of want to just pry the carriage door open? I feel like we might need that key for later."