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Boldt Castle, Alexandria Bay, NY

Photo: Clément Bardot, CC BY-SA 3.0, via Wikimedia Commons. Cropped and resized.

SightseeingHistory BuffDate NightFamily Favorite

Boldt Castle

Take a boat to Heart Island and tour a six-story castle, its gardens and stone towers in the Thousand Islands.

Heart Island, St. Lawrence River, reached by boat · Alexandria Bay, NY

About Boldt Castle

Boldt Castle stands on Heart Island in the St. Lawrence River and can only be reached by water, on tour boats from the U.S. and Canadian shores or by private boat. Hotel magnate George C. Boldt began it in 1900 as a gift for his wife, Louise, and work stopped in 1904 after she died. You can walk through restored, furnished rooms on the first two floors. The grounds include the Power House and the Alster Tower, which holds a two-lane bowling alley.

  • #castle
  • #thousand islands
  • #boat tour
  • #historic mansion
  • #gardens

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What's around here?

The closest stops to Boldt Castle, ordered by straight-line distance. A few more like it, plus some different kinds of fun so you can build a full day.

  • Sports & Outdoors
    Outdoor Adventure

    Mary Island State Park

    Under $25

    Boat out to a small wooded island in the Thousand Islands to picnic, fish, dock for the day or pitch a tent above the shipping channel.

    1.5 mi awaySwitch it up: Sports & Outdoors

  • Sports & Outdoors
    Outdoor Adventure

    Keewaydin State Park

    Under $25

    Camp above the St. Lawrence River in the Thousand Islands, swim in the summer pool and dock at the marina just outside Alexandria Bay.

    1.6 mi awaySwitch it up: Sports & Outdoors

  • Sports & Outdoors
    Outdoor Adventure

    Kring Point State Park

    Under $25

    Camp on a narrow Thousand Islands peninsula with the St. Lawrence River on one side and Goose Bay on the other, and dock your boat by your site.

    4.2 mi awaySwitch it up: Sports & Outdoors

  • Sports & Outdoors
    Outdoor Adventure

    Canoe-Picnic Point State Park

    Check prices

    Boat out to Grindstone Island to tie up, picnic, camp or rent a rustic cabin in one of New York's oldest Thousand Islands parks.

    8.2 mi awaySwitch it up: Sports & Outdoors

  • Sightseeing
    Local Gem

    Brockville

    No admission fee

    Ontario's City of the 1000 Islands, with a historic St. Lawrence River waterfront, trails and craft breweries.

    21 mi awayMore like this

  • Sightseeing
    History Buff

    Smiths Falls

    No admission fee

    Rideau Canal town with a historic downtown, a heritage Welcome Centre and walkable heritage attractions.

    39 mi awayMore like this

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