Boston 400 atlas
Building / Landmark

Castle Island

One of five peninsulas in Boston Harbor — an island until the causeway joined it to South Boston in 1928 — Castle Island holds the oldest fortified site in British North America, in use since 1634. The grounds cover 22 acres, with a little more than two miles of walking trails.

Castle Island
Photograph · Wikimedia Commons
Why it matters

Part of the connected record of this place — 1 relationship link it into the wider graph, each one a thread worth pulling.

Open the full civic recordCurrent pulse, routes, recommendations, and memory
Living object

Now, then, future

Every object is temporal: what it feels like now, what it used to mean, and what it can become next.

Now

quiet enough to notice details. Best now: one good detour.

Then

The older layer is mostly carried by nearby places and relationships.

Future

2026: America’s 250th — July 4, 2026.

Current modemidday
Historical echonearby
Connected eventAmerica’s 250th — July 4, 2026
Pulse

How it feels right now

Current energyquiet enough to notice details
Best nowone good detour
Best timemidday
localwalkableconnected
Rain scoremodest

Indoor escapes within a few blocks.

Laptop friendlinesslow

Coffee, libraries, bookstores, and campus edges.

Student presencelow

How strongly the nearby graph reads as campus life.

Tourist pressurelow

Fame, landmark pull, and visitor-facing assets.

Historic densitylight

Older records and historical edges around this object.

Serendipityquiet

Different kinds of things hiding within a short walk.

Turn this into a walk

Routes with a point of view

What should I see next?

Chosen moves from here

The editor's hand

Human recommendations

Graph connections
1
Plan your visit

In the graph 1 relationships — first-class data, not links

Explore Castle Island in the interactive Graph Explorer — click to expand every connection →
Located in
Boston

Nearby what sits within a few minutes’ walk

An unexpected connection

Castle Island is linked, through the graph, to Boston city, 2.9 mi away. The kind of thread you only find by following the connections.

Keep exploring graph-powered — every path below is a real relationship, not a guess

One record, 1 framing cross-property publishing — never duplicated

Boston400.com · you are here

How we know graph confidence — we explain our certainty, not just assert it

Source qualityBest source is primary / institutional
Independent corroboration1 source
Human-reviewedEditorially verified
Institutional backingCites a primary or institutional source
Record completeness60% of canonical fields present
Sources, by tier
U.S. National Park Service (NPS API) Primary / institutional
The same entity, elsewhere
Graph scores — our north star is relationship density, not page count
Relationship density13
1 connection
Record coverage74
metadata completeness
Graph authority20
centrality + reach + trust
Schema.org JSON-LD — what answer engines read
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