Denver sits where the Great Plains meet the Rockies — a city built on gold rush ambitions, cattle trade and Cold War military infrastructure, each era leaving behind forgotten structures in the surrounding landscape. From a 19th century amusement park theater that survived while everything around it was demolished, to Cold War missile complexes buried under the prairie about an hour east of downtown, Denver offers urban exploration with serious historical range.
Why Denver Is a Hidden Gem for Abandoned Buildings & Urban Exploration
Denver's urbex landscape spans three distinct eras — the Victorian mining boom that built ornate theaters and grand hotels, the mid-20th century Cold War that ringed the city with missile infrastructure, and the post-industrial decline that left Rust Belt-style warehouses and factories along the South Platte River corridor. Add in the Colorado ghost towns scattered through the mountains west of the city and Denver becomes one of the best urbex base camps in the American West.
1. Historic Elitch Theatre – Last Surviving Structure of Denver's 1890 Elitch Gardens, Still Standing at 38th & Tennyson
When John and Mary Elitch opened their zoological gardens on May 1, 1890, Denver was still a frontier city riding the silver boom. Elitch Gardens became one of the most culturally significant sites in Denver history, hosting the city's first zoo and decades of summer theater that drew famous actors from across the country. When the amusement park moved downtown in the mid-1990s, almost everything on the original site was demolished. The Historic Elitch Theatre alone survived — a stunning Victorian wooden theater at 38th and Tennyson, now cared for by a nonprofit foundation that runs guided tours and events while its restoration continues. Not an abandoned building, but a rare surviving piece of the Denver that urban explorers love to document.
🔗 Learn more: History Colorado – Elitch Gardens
2. Titan I Missile Complex, Deer Trail – Decommissioned 1965, Cold War Underground Site East of Denver (Known Location)
In the early 1960s, the Air Force built six Titan I ICBM complexes around Lowry Air Force Base to defend the Denver region during the Cold War — each designed to raise a nuclear-tipped intercontinental ballistic missile from an underground silo. When advances in missile technology made the Titan I obsolete in 1965, the sites were decommissioned, stripped and sold off. The Deer Trail complex, about an hour east of Denver on the Great Plains, is one of the best-known Cold War sites in Colorado: concrete silo caps and ventilation shafts still mark the prairie above a buried network of tunnels, silos and crew quarters. The site sits on private land — admire it from the road and never go underground without the owner's permission, as decommissioned silos can be flooded, unlit and structurally unsafe.
🔗 Also read: Top 5 Best Abandoned Places in the USA →
Abandoned Places Map Colorado 🇺🇸
Explore All 520+ Locations →3. Abandoned South Platte River Industrial Complex – Late Victorian Brick Mills with Millrace Still Visible, Denver West Side (Exclusively on Our Map)
A late Victorian brick industrial complex along the South Platte River — the millrace channel that once powered the machinery still visible alongside the building, original brick construction with decorative corbelling typical of 1890s Denver industrial architecture and the loading bays with iron hardware intact. Denver's west side industrial corridor developed rapidly between the 1880s and 1900s and has never been fully redeveloped; this complex is one of the most intact surviving examples of that era.
4. Abandoned Prairie Farmstead – 1920s Homestead with Collapsed Barn and Root Cellar Intact, Adams County (Exclusively on Our Map)
A 1920s homestead on the flat Adams County prairie east of Denver — main farmhouse structurally intact with original windows and door frames, a collapsed timber barn whose beams form a photogenic tangle against the Colorado sky and a stone root cellar with its arched entrance still perfectly preserved. The eastern Denver metro's agricultural past is rapidly being erased by suburban expansion; this compound sits in the shrinking belt of original prairie farmland between the city and the Kansas border.
5. Forgotten Rocky Mountain Mining Support Town – 1890s Assay Office and General Store Still Standing, Clear Creek County (Exclusively on Our Map)
A support community from Colorado's 1890s silver and gold mining era — the assay office where miners brought ore samples for testing still has its original counter and scales, the general store retains its wooden shelving and the surrounding cabins range from structurally intact to slowly collapsing into the mountain slope. Colorado has dozens of mining ghost towns; this one sits off the main tourist circuits with far less foot traffic than the well-known sites, and within easy reach of Denver along the I-70 corridor.
Safety Tips for Urban Exploration in Denver
- Altitude: Denver sits at 5,280 feet and mountain sites can be significantly higher — acclimatize before extended exploration and watch for altitude sickness symptoms
- Underground sites: missile silos and mine tunnels can be flooded, unstable and low in oxygen — never enter underground spaces without permission, proper lighting and appropriate equipment
- Mountain weather: high-altitude roads to mining towns are often closed by snow from late fall to late spring — check conditions before you go
- Never explore alone — always bring at least one other person and let someone know your location
The urbex code applies everywhere: "Take nothing but photographs, leave nothing but footprints."
❓ FAQ – Abandoned Places in Denver
What is the most famous historic ruin in Denver?
The Historic Elitch Theatre — the last surviving structure of Denver's original Elitch Gardens, which opened in 1890. When the park moved downtown in the mid-1990s, everything was demolished except this Victorian theater, which still stands at 38th and Tennyson in northwest Denver and can be visited on guided tours.
Are there Cold War abandoned sites near Denver?
Yes — six Titan I ICBM missile complexes were built around Lowry Air Force Base in the early 1960s and decommissioned in 1965 when the missiles became obsolete. The Deer Trail site, about an hour east of Denver, is one of the best-known Cold War relics in Colorado. Most of these sites are now on private land.
Are Colorado ghost towns accessible from Denver?
Yes — Colorado has dozens of gold and silver mining ghost towns. Some, like Nevadaville near Central City or Caribou near Nederland, are about an hour from Denver. Famous sites like St. Elmo are a longer day trip, while Ashcroft and Animas Forks are better suited to a weekend. Many high-altitude roads are closed by snow for much of the year.
🎯 Summary
Denver's abandoned buildings span 130 years of Western ambition — from a Victorian theater that survived when everything around it was demolished, to Cold War missile complexes buried under the Great Plains and 1890s mining towns frozen in the Rockies. Each of these 5 abandoned places in Denver captures a different chapter of the city and state that gold built. All of them are selected from our Abandoned Places Map USA — 5,000+ GPS locations across the United States.
