Marconi Wireless Station Site
Why it's listed
On a coastal bluff in South Wellfleet, Massachusetts, the ruins of Guglielmo Marconi's wireless station mark the origin of the first wireless message sent from the United States to Europe, on January 18, 1903. The station, nearly complete by November 1901, had its original circle of 20 poles destroyed by a storm, and four 210-foot wooden latticed towers replaced them in 1902. Two kerosene engines, an alternator, a Tesla transformer and a spark-gap transmitter produced 30,000 watts. The station mainly sent news to ships at sea and ran until 1917. Wartime censorship, cliff erosion and the vacuum tube, which made spark-gap transmission obsolete, led to dismantling in 1922. What remains includes the concrete base of the transmitter house, part of a concrete corridor, brick fragments from the powerhouse and an exposed tower base. The site is now part of Cape Cod National Seashore and is used for interpretation.
Significance in brief: The station sent the first wireless message from the United States to Europe on January 18, 1903. The nomination calls it the only nationally significant historic site within Cape Cod National Seashore. It also credits Marconi with making wireless telegraphy practical.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 75000158, listed May 2, 1975. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | 1 mi. NE of Cape Cod National Seashore, South Wellfleet |
|---|---|
| County | Barnstable County |
| Listed | May 2, 1975 |
| Reference number | 75000158 |
| Resource type | Site |
| Period of significance | 20th Century (1901-1922 per the construction and operation dates given) |
| Architect / builder | Carl Taylor, chief builder of Marconi stations |
| Areas of significance | Military, Engineering, Science, Communications, Invention |
| Level of significance | National |
| Status (as stated in the nomination) | Ruins; unoccupied, used for interpretation within a park. The form recommends preservation. |
| Acreage | 1 |
| Coordinates | 41.91399, -69.97170 (NPS GIS) |
What listing means for this property
Sites (archaeological sites, battlefields, landscapes) are often listed with a restricted address to protect them from looting or disturbance. Listing is honorary for private owners; federal undertakings on or near the site go through Section 106 review, and state laws may protect burials and artefacts regardless of listing.
Noted as vacant in the nomination. Nomination documents can be decades old; current status may differ. If you are considering buying an empty listed property, read the due-diligence checklist.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 75000158.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q1353744
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.