Boldt Castle — a verified famous property.
Location: Heart Island, Alexandria Bay, New York, United States
Verified facts
- Located in Heart Island, Alexandria Bay, New York
confidence 75/100 · 3 independent sources · SRC-0284, SRC-0285, SRC-0462 - Built in 1900
confidence 75/100 · 3 independent sources · SRC-0284, SRC-0285, SRC-0463 - Architectural style: Rhineland castle (Châteauesque)
confidence 80/100 · 4 independent sources · SRC-0284, SRC-0285, SRC-0462, SRC-0464
Evidence & sources
- SRC-0284 — Official Boldt Castle Website (Thousand Islands Bridge Authority) (Tier 1, owner_statement; retrieved June 2026)
- SRC-0285 — Wikipedia: Boldt Castle (Tier 3, encyclopedia; retrieved June 2026)
- SRC-0462 — I LOVE NY (New York State official tourism, Empire State Development) — Boldt Castle listing (Tier 1, official_archive; retrieved June 2026)
- SRC-0463 — WWNY 7 News (Watertown, NY) — Boldt Castle: A story of love & heartbreak (Tier 2, journalism; retrieved June 2026)
- SRC-0464 — Alluring World — Boldt Castle (Tier 3, reference_database; retrieved June 2026)
How we verify
Every fact above is independently corroborated by at least two reputable sources and
confidence-scored before publication. Claims that cannot clear that bar are withheld. We publish
location only at neighborhood/city granularity — exact street addresses and personal information
are structurally barred from publication. Last reviewed June 2026.