Things to do in Jefferson County

Activities, attractions and tours

A historic stone castle on a lakeside island with a clear sky.
A stone castle with towers on a lakeside island, surrounded by trees and a larger building in the background.
A stone castle with multiple towers by a calm lake, surrounded by lush greenery and a partly cloudy sky.
A historic mansion with a red roof and stone towers by a lake.
A stone structure with a statue on top by a waterfront.

Things to do

Kingston Shipwreck Cruise

Kingston Shipwreck Cruise

S$48
per adult
Kingston Shipwreck Cruise
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Most popular experiences in Jefferson County

Tours & day trips

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3-Hour 1000 Islands Cruise from Gananoque with views of Boldt Castle

3-Hour 1000 Islands Cruise from Gananoque with views of Boldt Castle

Activity duration is 3 hours
9.0 out of 10 with 232 reviews
Free cancellation available
Price is S$52 per adult
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Food, drink & nightlife

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From Ivy Lea: 2-Hour Two Castle 1000 Islands Scenic Cruise

From Ivy Lea: 2-Hour Two Castle 1000 Islands Scenic Cruise

Activity duration is 2 hours
9.4 out of 10 with 22 reviews
Free cancellation available
Price is S$44 per adult
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Holiday & seasonal tours

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Kingston: Sunset Dinner Cruise

Kingston: Sunset Dinner Cruise

Activity duration is 3 hours
8.8 out of 10 with 63 reviews
Price is S$131 per adult
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Air, helicopter & balloon tours

See all 3 activities
Thousand Islands Helicopter Tour

Thousand Islands Helicopter Tour

Activity duration is 10 minutes
10.0 out of 10 with 5 reviews
Free cancellation available
Price is S$121 per adult
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What to do in Jefferson County

Stay near popular Jefferson County attractions

A historic stone castle on a lakeside island with a clear sky.

Boldt Castle

9.4/10 (1,063 reviews)
After visiting Boldt Castle, make a plan to see the other sights and activities in Alexandria Bay. Amble around the area's riverfront or seek out the local tours.
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A historic stone castle on a lakeside island with a clear sky.

Alexandria Bay

A coastal landscape with a lighthouse, white houses, and a ship in the distance.

Sackets Harbor