Entry No. 6 — the Washington, D.C. file — filed under: cabinet of curiosities

The Mansion on O Street

A 30,000-square-foot, 100-room mansion of maze-like passageways and hidden doors — chronicled in James Patterson's novel Four Blind Mice — where the collection ranges from a two-story log cabin to an art-deco penthouse to a Beatles-themed room, and nearly every object on display is for sale.

The move: Buy timed tour tickets and hunt for the secret doors room by room together, then debate which piece of the collection you'd actually buy on the way out.

• 📍 Dupont Circle, Washington, DC
• 💸 $$
• ⚡ Up for anything
• 🌗 Indoors

Where: 2020 O Street NW, Washington, DC 20036

Hours: Added 2026-07-19 — confirm current hours before you go.

⚠ Seasonal or scheduled — always check before you go.

Plan a visit & invite your people →

Further reading: Official site · Wikipedia

last checked: 2026-07-19