Artificial islands across the United States are gaining new relevance as cruise gateways, urban parks, recreation areas and future waterfront destinations.
From PortMiami and San Francisco’s Treasure Island to New York’s Little Island, engineered land is supporting strikingly different visitor experiences. Travellers can board cruises, attend performances, walk through gardens, camp beside the Chesapeake Bay or explore historic waterfronts.
Many of these sites were originally ports, military properties or dredged-material facilities. Their evolving tourism roles demonstrate how existing infrastructure can be reused instead of creating entirely new reclaimed islands.
However, successful transformation requires more than attractive designs. Safe access, clean water, reliable transport, environmental restoration and sustained public investment determine whether these locations can support long-term tourism.
PortMiami drives artificial-island tourism
PortMiami is the largest tourism-focused example within this diverse group.
The port occupies reclaimed land in Biscayne Bay, where Dodge and Lummus islands were joined and expanded. Today, the approximately 520-acre complex accommodates major cruise terminals and cargo facilities.
Miami-Dade County recorded 8,564,225 cruise passenger movements during the 2025 financial year. That represented growth of around four per cent from 8,233,056 during the previous year.
Cruise agreements generated approximately 66 per cent of the port’s direct revenue in 2025. Preferential berthing agreements provide substantial guaranteed revenue for the following financial year.
The port attributes roughly $61 billion in annual economic impact and about 340,000 jobs to its combined cruise and cargo operations. Those figures underline how reclaimed maritime infrastructure can influence hotels, restaurants, airlines, ground transport and visitor spending.
Expansion also brings environmental obligations. Dredging, terminal construction and shoreline work can require water-quality monitoring, habitat surveys and controls protecting mangroves and underwater vegetation.
Treasure Island begins another transformation
Treasure Island in San Francisco was created by the US Army Corps of Engineers during the 1930s.
A rock perimeter was constructed over the Yerba Buena Shoals before the area was filled with dredged material. The 403-acre island hosted the Golden Gate International Exposition, which opened in 1939.
It later became a naval station. Today, Treasure Island is undergoing a multi-phase redevelopment planned to include parks, hotels, restaurants, shops, entertainment spaces, a marina and improved transport.
The project combines tourism development with a much broader urban neighbourhood. Thousands of homes are also included, meaning future public spaces must work for residents and visitors.
Its military history creates additional challenges. Environmental cleanup and land-transfer work continue in areas affected by earlier naval activities and waste management.
Treasure Island therefore illustrates the complexity of waterfront renewal. Tourism investment can create views, hospitality and recreation, but it cannot proceed without addressing contamination and community access.
Little Island creates a major visual impact
Little Island has become one of the most recognisable modern waterfront parks in New York City.
Opened in May 2021, the approximately 2.4-acre attraction stands above the Hudson River on engineered marine piles. Sculpted landscaping creates hills, gardens, paths and viewing areas within a relatively compact site.
Visitors can enjoy lawns, performance spaces and views across the river, New York Harbor and Manhattan. Free admission also makes the attraction widely accessible.
Little Island demonstrates that an artificial tourism site does not require a resort, road network or extensive land reclamation. Creative architecture, cultural programming and public space can generate a compelling visitor experience.
It also contributes to the wider popularity of Hudson River Park, which receives more than 17 million visits annually. That figure represents the entire park rather than Little Island alone.
Dredged land becomes an outdoor escape
Hart-Miller Island in Maryland offers a very different experience.
The modern island covers approximately 1,100 acres in Chesapeake Bay near Baltimore. Former islands were connected by a dike, and the enclosed area received dredged material from Baltimore Harbor until 2009.
Large sections now operate as Hart-Miller Island State Park. Visitors can enjoy beaches, swimming, fishing, birdwatching, picnics, camping, cycling and more than eight miles of trails.
Most travellers reach the park by private boat, giving it an adventurous quality. However, restricted areas remain important for habitat management and environmental protection.
In San Diego, Fiesta Island and Vacation Isle also demonstrate how dredging reshaped public recreation. Both manufactured islands form part of Mission Bay and provide shoreline access, watersports and open spaces.
New destinations emerge from difficult histories
Renard Island in Green Bay represents a future opportunity rather than an established attraction.
Created as a dredged-material facility, the 55-acre island received PCB-contaminated sediment before being capped with clean material. Plans envision trails, fishing piers, dining, camping, festival space and an adventure playground.
Permanent access remains a key obstacle, highlighting how one transport or legal issue can delay an otherwise ambitious tourism plan.
Elsewhere, Texas’ Pleasure Island serves anglers, RV travellers and waterfront visitors. Monument Island in Miami Beach functions as a boating stop centred on its historic memorial.
Lady Bird Johnson Park in Washington offers a quieter example, combining planted landscapes, pedestrian routes and views near the capital’s memorial district.
Together, these locations reveal America’s central artificial-island opportunity: thoughtful reuse. Former industrial, military and dredging sites can become valuable tourism assets, but only when public access advances alongside conservation, environmental repair and long-term maintenance.
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