Hidden Gems Of New York’s Thousand Islands Boldt Castle Heart Island

Published: June 28, 2025

by Hildagard Coyne

Have you ever heard of Boldt Castle on Heart Island? This hidden gem in New York's Thousand Islands is a must-see. Built by millionaire George C. Boldt as a tribute to his wife, the castle is a stunning example of early 20th-century architecture. Visitors can explore the grand halls, lush gardens, and even a yacht house. Whether you're a history buff or just looking for a unique day trip, Boldt Castle offers something for everyone. Don't miss the chance to see this beautiful piece of history nestled in the scenic Thousand Islands.

Hidden Gems of New York's Thousand Islands

New York's Thousand Islands region is a treasure chest of history, nature, and adventure. While Boldt Castle on Heart Island is a well-known attraction, there are many lesser-known spots that deserve attention. Let's dive into some hidden gems that will make your visit unforgettable.

1. Singer Castle on Dark Island

Singer Castle, a stunning medieval-style fortress, offers a glimpse into the opulent lifestyle of the early 20th century. Built by Frederick Bourne, the castle features secret passageways, hidden doors, and a dungeon.

Secret Passageways: Explore the hidden corridors that connect various parts of the castle.
Guided Tours: Learn about the history and legends surrounding the castle.
Scenic Views: Enjoy breathtaking views of the St. Lawrence River from the castle grounds.

2. Thousand Islands National Park

This national park, spread across several islands, is a haven for nature lovers. It offers a variety of outdoor activities and stunning landscapes.

Hiking Trails: Wander through lush forests and along scenic shorelines.
Kayaking: Paddle through crystal-clear waters and explore hidden coves.
Wildlife Watching: Spot diverse wildlife, including ospreys, herons, and turtles.

3. Antique Boat Museum

Located in Clayton, this museum showcases the rich maritime history of the Thousand Islands region. It's a must-visit for boat enthusiasts and history buffs alike.

Boat Exhibits: Admire a collection of antique boats, from sleek speedboats to elegant sailboats.
Interactive Displays: Engage with hands-on exhibits that bring maritime history to life.
Boat Rides: Experience the thrill of riding in a vintage boat on the St. Lawrence River.

4. Rock Island Lighthouse State Park

Perched on a small island, this historic lighthouse offers panoramic views and a glimpse into the life of a lighthouse keeper.

Lighthouse Tours: Climb to the top for stunning views of the river and surrounding islands.
Museum: Learn about the history of the lighthouse and its keepers.
Picnic Areas: Enjoy a relaxing picnic with a view of the water.

5. Wellesley Island State Park

One of the largest parks in the Thousand Islands, Wellesley Island State Park offers a wide range of recreational activities.

Camping: Choose from tent sites, cabins, or RV sites for a memorable outdoor experience.
Fishing: Cast a line in the park's abundant fishing spots.
Golfing: Play a round of golf at the park's scenic golf course.

6. Minna Anthony Common Nature Center

Located within Wellesley Island State Park, this nature center is perfect for families and nature enthusiasts.

Educational Programs: Participate in guided nature walks and educational programs.
Bird Watching: Spot a variety of bird species from the center's observation deck.
Nature Trails: Explore miles of trails that wind through diverse habitats.

7. Thousand Islands Winery

For a taste of local flavor, visit the Thousand Islands Winery in Alexandria Bay. This family-owned winery offers a delightful experience for wine lovers.

Wine Tastings: Sample a variety of wines made from locally grown grapes.
Vineyard Tours: Take a guided tour of the vineyard and learn about the winemaking process.
Events: Attend special events like wine and cheese pairings or live music nights.

8. Clayton Distillery

Clayton Distillery, the first distillery in the Thousand Islands region, produces a range of handcrafted spirits.

Distillery Tours: Discover the art of distilling and see how spirits are made.
Tastings: Sample a selection of spirits, including vodka, gin, and whiskey.
Gift Shop: Purchase unique souvenirs and locally made products.

9. Boldt Yacht House

While Boldt Castle is the star attraction, the Boldt Yacht House on Wellesley Island is a hidden gem worth visiting.

Historic Boats: View a collection of historic boats, including George Boldt's luxurious houseboat.
Architecture: Admire the stunning architecture and craftsmanship of the yacht house.
Guided Tours: Learn about the history of the Boldt family and their love for boating.

10. Thousand Islands Bridge

Connecting the U.S. and Canada, the Thousand Islands Bridge offers breathtaking views and a unique experience.

Scenic Drive: Drive across the bridge and enjoy panoramic views of the islands and river.
Observation Deck: Stop at the observation deck for a bird's-eye view of the region.
Photography: Capture stunning photos of the bridge and surrounding landscapes.

Discover the Magic of Boldt Castle

Boldt Castle on Heart Island offers a unique blend of history, architecture, and natural beauty. This hidden gem in New York's Thousand Islands is a must-visit for anyone looking to experience something truly special. Wander through the grand halls, explore the lush gardens, and take in the stunning views of the St. Lawrence River. Each corner of the castle tells a story, making it a fascinating destination for history buffs and casual visitors alike. Don't miss the chance to see this architectural marvel and learn about the love story that inspired its creation. Whether you're planning a day trip or a longer stay in the Thousand Islands, Boldt Castle promises an unforgettable experience. Make sure to add it to your travel itinerary and see for yourself why it's one of New York's most captivating attractions.