Borough Market has long held sway as an essential stop on the London food tour.
Those huge burgers alone make it an essential stop for them.
One essential stop on the science circuit is the M.I.T. Museum, featuring rotating exhibits on new research at the Massachusetts Institute of Technology.
In Woody Allen's films a visit to the Carlyle became an essential stop on his characters' cultural tour.
An essential stop for diners in the Mount Sinai area, it is also worth a visit by those from farther afield.
The Costa Verde in the south-west also has lovely, undeveloped beaches and is an essential stop on the way to Cagliari, the lively capital.
It's an essential stop for anyone interested in the region's history, and a lively symbol of Ghana's future.
For art, the essential stop is the Cultural District, but you'll want to sample all three, especially if your interest extends to architecture.
Can the Westport Playhouse, once a tryout center for new plays as well as an essential stop on a thriving summer stock circuit, recapture its own golden age?
Later in the afternoon, I make for Wine Tastes (14 Beach Street, +3 409 2226) in the heart of town, an essential stop for wine-lovers.
