As Maine's largest city that is situated on the shores of Casco Bay, Portland offers residents and visitors alike plenty of ways to get out on the water and see everything from light houses and old forts to islands and harbor seals.Here are five great options:

Portland Schooner Company: The Bagheera and Wendameen give people a chance to sail on Casco Bay for two-hour windjammer cruises. The Portland Schooner Company also does overnight trips and lobster bakes.

Portland Discovery Land and Sea Cruises: For those who love Maine lighthouses and would like to see them from the water, these 90-minute cruises feature Portland Harbor Breakwater Light (Bug Light), Spring Point Ledge Light, Ram Island Ledge Light, and Portland Head Light.

Lucky Catch: Lobstering is Maine's number one industry and the Lucky Catch offers a great way to experience it up close and personal. Guests have the opportunity to actually do some lobstering during these 90-minute trips.

Casco Bay Ferries: One of the most inexpensive and enjoyable ways to experience the beauty of Casco Bay is about the Casco Bay ferries. This vital transportation network that keeps island residents connected to the mainland also offers sightseeing tours, lobster bakes and music cruises all summer long.

Downeast Duck Adventures: You really didn't think Boston was the only place that offers duck boat cruises. Portland has them also thanks to Downeast Duck Adventures. Guests first get to see a lot downtown Portland before these unique vessels plunge into Casco Bay.

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