Sag Harbor and its surrounding areas on Long Island's East End offer a variety of attractions and points of interest to explore. Here are some popular sightseeing places in and around Sag Harbor, New York:

1. Sag Harbor Whaling and Historical Museum: Located on Main Street, this museum preserves the village's whaling history and maritime heritage through exhibits, artifacts, and displays.

2. Main Street Shops and Galleries: Sag Harbor's Main Street is lined with boutique shops, art galleries, antique stores, and cafes. It's a charming area to stroll, shop for unique items, and explore local art.

3. Sag Harbor Marina: The marina is a hub of activity with sailboats, yachts, and fishing boats. Visitors can enjoy waterfront views, watch boats coming and going, and dine at waterfront restaurants.

4. Havens Beach: A public beach located at the end of Bay Street, offering sandy shores, picnic areas, and views of Sag Harbor Cove. It's a popular spot for swimming, sunbathing, and enjoying scenic views.

5. Bay Street Theater: A cultural center in Sag Harbor, Bay Street Theater hosts live performances including plays, musicals, comedy shows, and concerts. It's located near the marina with views of the harbor.

6. Sag Harbor Hills, Azurest, and Ninevah Beaches: These neighboring communities offer beautiful beaches, often less crowded than other parts of Long Island. They are great spots for relaxation and enjoying the natural beauty of the area.

7. Long Wharf: A historic wharf on Sag Harbor's waterfront, offering views of the harbor and marina. It's a great place for a leisurely walk, watching boats, and enjoying the coastal scenery.

8. Sag Harbor Cinema: A historic cinema that has been recently restored, offering a mix of independent films and special screenings. It's located on Main Street and contributes to Sag Harbor's cultural scene.

9. Mashashimuet Park: Located just outside Sag Harbor village, this park offers walking trails, sports fields, playgrounds, and picnic areas. It's a popular spot for outdoor recreation and family-friendly activities.

10. Wolffer Estate Vineyard: Located nearby in Sagaponack, Wolffer Estate Vineyard offers wine tastings, tours of the vineyard, and a scenic setting with vineyard views. It's a short drive from Sag Harbor and worth visiting for wine enthusiasts.

These popular sightseeing places in Sag Harbor and the surrounding area showcase its rich history, natural beauty, cultural attractions, and vibrant community. Whether you're interested in history, outdoor activities, shopping, or enjoying the waterfront, Sag Harbor offers something for everyone to enjoy on Long Island's East End.