best-kept secret

Closely guarded information

A best-kept secret is something excellent that few people know about—a restaurant, vacation spot, or method that deserves wider recognition: This beach is the area's best-kept secret.

The phrase implies the speaker is letting you in on privileged information, though it's often used with deliberate irony for things that aren't actually secret at all.

exclusive

insider

One with confidential access

confidential · privileged · elite · select · restricted · gated · word-of-mouth · cognoscenti · initiated · clique

hidden

gem

Polished precious stone

spot · haunt · hideaway · retreat · haven · sanctuary · oasis · nook · enclave · jewel

coveted

sought-after

Much wanted by many

treasure · valuable · precious · rare · choice · premium · protected · cherished · hoarded

undiscovered

unknown

Not yet discovered

unrecognized · unseen · emerging · nascent · overlooked · incognito · anonymous · obscure · low-profile · inconspicuous

Opposites
publicity/visibility

best-kept secretcommon knowledge

Widely shared information

public knowledge · household name · world-famous · open secret · famous

information control

best-kept secretpublic announcement

Official communication to all

full disclosure · open book · out in the open · press release · transparent

notoriety

best-kept secretcelebrity

Widely recognized public figure

phenomenon · sensation · blockbuster · crowd favorite · media darling

Family

best, better, kept, keeper, keeps, keepers, secret, secrets, secrecy

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Positive · Everyday, not technical · Rated G