The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Mining town from the late 1890s, once home to Calamity Jane.

An entire town preserved as a historic landmark.

An eclectic trailer park retreat in the middle of the California desert.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

Tour the sci-fi-esque reality of governmental disease management.

The beauty of urban decay, hiding some dark secrets.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

From scholastic to sepulchral - now under reconstruction.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A hip bar decorated with walls of golden skulls.

Become a prohibition rebel.

New York's oldest magic store.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Elevated freight railway turned wildly successful urban park.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.