The United States seriously pursued a Nicaragua canal—before committing to Panama. The 1867 Nicaragua Canal Treaty (with the Nicaraguan government) granted exclusive rights to a US-chartered company backed by Cornelius Vanderbilt's Accessory Transit Company. Surveys confirmed feasibility: Lake Nicaragua + San Juan River + a 12-mile Pacific divide crossing.
French momentum: Ferdinand de Lesseps (Suez builder) launched the Panama effort in 1881. By 1902, despite catastrophic failure, the French had excavated 78 million m³, built hospitals, railways, and a trained workforce. The Compagnie Nouvelle du Canal de Panama held a concession expiring 1904—assets available cheap.
Geology: Nicaragua required a sea-level canal (no locks feasible at the time) through volcanic terrain with seismic risk. Panama's Chagres River valley allowed a lock-canal design—engineering the Americans mastered.
Politics: The 1901 Hay-Pauncefote Treaty (UK) cleared US unilateral action. The 1903 Hay-Herrán Treaty (Colombia) failed. Panama's US-backed independence (Nov 1903) → Hay-Bunau-Varilla Treaty (Nov 1903) → Canal Zone control. Nicaragua's Zelaya government resisted US terms.
Volcano stamp: A Nicaraguan stamp depicting Momotombo volcano erupting allegedly influenced US senators—"Nature opposes Nicaragua." Apocryphal but revealing.
1914: Bryan-Chamorro Treaty gave US option (never exercised). 2013: HKND Group (Chinese) concessioned a $50B interoceanic canal—groundbreaking 2014, stalled by financing/environmental concerns. The dream persists; the geology hasn't changed.