A hike or drive (note this is a toll road owned by Fort Ticonderoga. Access is included with daily admission) up Mt. Defiance in Ticonderoga is worth the trip for the commanding view of Lake Champlain from the summit alone.
The fact that it offers splendid birding is an added bonus, and birders can find species like Ruffed Grouse, Great Crested Flycatcher, Wood Thrush, Black-and-white Warbler, Scarlet Tanager, Rose-breasted Grosbeak, and both Black-billed and Yellow-billed Cuckoos to name a few. The base of the mountain is also a good place to park and listen for Eastern Whip-poor-wills calling during the spring and summer.