The spectacular history of spectacles on display.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

A beautiful maze marks where three countries meet.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

Orthodox church partially financed by Tsar Nicolas II.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

A display of magnificent stained glass windows is the first exhibit of its kind.

Former meatpacking facility turned vertical farm and sustainable business complex.

Years of archaeology, just chillin' by the water cooler.

First planned industrial community in the United States.

A European-style bath house in Chicago.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

An unusual house built using an iso-elastic membrane.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.