The small sanctuaries lie just off the beaten path near one of Bhutan's most famous attractions.

This three-chambered cave is the only protected natural bat hibernaculum in Quebec.

These flying foxes dangle from the trees around the library like fuzzy black fruit.

An unfinished rail tunnel that has since been used to house cheese and bats.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

The summer home of the largest colony of bats in the world.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

This massive subterranean fissure is known as the "underground Grand Canyon."

A small Chicago museum filled with thousands of preserved butterflies, beetles, and more.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

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

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

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

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

Over 1,000 pieces of one of the most niche art objects imaginable: the glass paperweight.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This historic hotel invented the chocolate brownie.

The beloved home to all publications indie, erotic, and punky.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A Bibliophile's Dream.