peninsula

isthmus

Narrow strip connecting landmasses

• capeShouldered sleeveless wrap
• promontoryElevated land jutting waterward
• headlandCoastal land jutting seaward

spit · inlet · bay · gulf · tombolo · fjord · strait · sandbar · bluff · cliff

remote

Distant or controller

• insularityNarrow detachment from broader views
• enclaveSurrounded distinct territory
• seclusionVoluntary withdrawal from society

detachment · outpost · refuge · retreat · sanctuary · inaccessible · windswept · rugged · solitary · separated

shoreline

Land-water boundary

• beachSandy waterside margin
• harborSafe anchorage for ships
• marinaRecreational vessel harbor

estuary · lagoon · dunes · seashore · cliffs · tidal · bay · gulf · oceanfront · seaside

expedition

Organized exploratory journey

• navigatorRoute-directing crew member
• discoveryAct of finding something
• voyageJourney by sea

explorer · cartography · seafaring · caravel · compass · circumnavigation · landfall · charting · mariner · coastline

mudflat

Exposed shore sediment

• sandbarUnderwater ridge of sediment
• shoalShallow water hazard
• tomboloSand strip linking island

embayment · tideland · foredune · detritus · seamount · erosion · sediment · bedrock · uplift · tectonics

border

Outer edge or limit

• edgeBoundary or sharpness
• perimeterShape's outer edge length
• marginEdge of a page

demarcation · frontier · outline · threshold · limit · fringe · verge · circumscription · contour

• geography termsmap, atlas, globe, compass, coordinates
• landformsmountain, cliff, valley, volcano, mountain ridge
• coastal geographyarchipelago, atoll, islet, cay, skerry
• coastal landformsbeach, beaches, cliff, cliffs, coast
• coastal placesbeach, Big Sur, Monterey Bay, resort, port town
• waterfront spotsbeach, pier, dock, marina, boardwalk