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

The 28-foot granite map plots the locations of 40 theaters in New York City.

This former iron ore mine comes alive with fascinating stories of its history.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

The small candy-colored ride is the last rooftop Ferris wheel in Tokyo.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

Giant marble phalluses on the sacred island of antiquity.

A sharp sculpture made of thousands of pieces of jagged glass.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

This massive, ancient stone was disassembled and then put back together again.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

The oldest surviving synagogue in New York City is now a soaring art space.

A terrific purveyor of natural history objects and curios.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.