A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

Granny Smiths and Fujis can both be traced back to Kazakhstan, where apples still grow wild.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

The only sea in the world that has no land boundary.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

A Jenga-style cylindrical tower of books that appears to go on forever.

The world's oldest bookshop still in operation.

This innocent-looking townhome is actually a subway exit.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A Natural History and Science Emporium.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A crumbling hospital from the 1850s on Roosevelt Island.

A hidden "place of interment for gentlemen."

Unique antiquarian shop specializing in globes, maps, and prints.

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

Little Red Lighthouse under the George Washington Bridge.

Wine bottle sculpture with a ship's stateroom inside.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Skewer up Kangaroo.

Join in a Seance at the Swedenborgian Church.

Check your calendars; you might be attending a drive-in movie or sitting next to a fashion runway.

Visit the site of a subway powered by nothing more than air--and lots of it.

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