Back to sets
Mystery Castle
Hidden Side
Set #70437-1

Mystery Castle

Piece count, minifigures, release year, and a quick overview of the set.

1035
Pieces
6
Minifigs
2020
Year

Qualifying purchases may earn commissions. Pricing and availability vary by region.

Overview

Great for expanding your brick city or starting a new collection.

Build experience78%
Playability70%
Display value52%

About this set

The LEGO Mystery Castle (70437-1) is a standout addition to the Hidden Side theme. Released in 2020, this set comprises 1035 pieces and includes 6 minifigures, offering a comprehensive building experience that caters to both casual fans and dedicated collectors. Whether you're looking for a center-piece for your display or a functional set for play, the Mystery Castle delivers on multiple fronts with its authentic design and quality components.

Quick highlights

Pros
  • Stunning attention to detail
  • Challenging and rewarding build
  • Excellent display presence
Cons
  • Many small pieces can be tedious

More from Hidden Side

View all
Hidden Side
J.B.'s Submarine
70433-12020

J.B.'s Submarine

224pcs3figs
View setPrice
Hidden Side
El Fuego
792004-12020

El Fuego

9pcs1figs
View setPrice
Hidden Side
Newbury Abandoned Prison
70435-12020

Newbury Abandoned Prison

400pcs4figs
View setPrice
Hidden Side
El Fuego's Stunt Cannon
30464-12020

El Fuego's Stunt Cannon

46pcs1figs
View setPrice
SetScout

Search LEGO sets, compare the details, and check prices. Independent fan site, not affiliated with the LEGO Group.

SetScout may earn a commission from qualifying Amazon purchases.

LEGO is a trademark of the LEGO Group, which does not sponsor, authorize, or endorse this site.

2026 SetScout