The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

A decommissioned military complex that's now a modern industrial park.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

The famed amusement district marks the beginning of summer with a wild procession of nautical creatures.

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

This innocent-looking townhome is actually a subway exit.

Once the largest winery in the world, this castle-like building now sits abandoned on the San Pablo/San Francisco Bay shore.

Abandoned landscape once home to "the world's largest winery."

Across Ring Mountain is a vast collection of Native American petroglyphs unique to the region.

One of the highest points in Bexar county offers birdseye views of San Antonio and a four-story stone tower.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

The oldest active mini golf course in the U.S. has an elegant Art Deco style filled with lush tropical plants.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

Three hundred years of preserved Spanish colonial history in San Antonio.

The ruins of a medieval citadel believed to be haunted by a ministry of wish-granting djinns.

This synagogue is the only place of worship for New Delhi’s small Jewish community.

This ruined relic of the medieval city of Jahanpanah is a quiet oasis in the middle of New Delhi.

India's first open-air public art district sits in the heart of the country's capital.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.