The world's most expensive keys: They pay fortunes for beach entry.

While Martha's Vineyard Island in the U.S. state of Massachusetts is known for its million-dollar homes and famous vacation spots, the access system to some of its private beaches also draws attention. Entry to certain shores is provided only with physical keys owned by authorized persons.

These keys, available in limited numbers, have reached almost a fortune's worth due to high demand. In some sales, the price of keys granting beach access exceeds $400,000, while the amounts paid for rare examples are jaw‑dropping.

The Key that Opens the Beach Door

Black Point Beach in the Chilmark area of Martha’s Vineyard is one of the shores equipped with a private access system. The wooden fence gates that lead to the beach can be opened only with keys owned by those with access rights.

Key holders not only enjoy access to the private beach. They can also use the beach’s parking lot and stay largely away from the crowds that gather on the island’s public beaches during summer.

Sold for 475,000 dollars

The prices of keys that grant access to private beaches form the most eye‑catching part of the system.

According to information reported by the Wall Street Journal, a key that grants access to Quansoo Beach in Chilmark sold for $475,000 last year. The fact that only a handful of keys go on sale each year and that demand is high drives prices up rapidly.

Its Value Is Not Just About the Beach

The sole reason these keys command high prices is not simply the ability to enter a private beach. Compared to public shores, these quieter beaches offer visitors a sea experience away from crowds.

The limited parking capacity at some private beaches makes the right of access even more valuable. In particular, during the summer months when visitor numbers to the island rise, access to private beaches is seen as a significant privilege.

In some cases, the right to access a beach can be directly tied to real estate. Consequently, a private beach right can significantly affect the overall value of the property.

Not Every Beach Key Is For Sale

The same system is not applied to all private beaches in Martha’s Vineyard. While some beach associations prohibit the sale of keys, other areas allow the transfer of access rights under certain conditions.

In some regions, the number of keys in circulation is limited. This aims to preserve beach capacity and prevent private shores from becoming overcrowded.

Because most keys are transferred among families, the number of options available on the market remains quite low. Limited supply and high demand turn some Martha’s Vineyard beach keys into exotic assets worth hundreds of thousands of dollars.