Dr Barnes' $25 billion private collection of art and arboretum.

A layered tribute to the work of mosaicist Isaiah Zagar.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This classic restaurant features a gorgeous mirror-clad room.

Cold war icon and onetime "hole" in the iron curtain.

An old department store turned Nazi prison turned artist commune.

A slice of central Asia in the middle of Berlin.

Community bookshelf of 25-foot-tall book spines.

Old submarine parts have been converted into faux whale fins.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

This failed condo development was reborn as a street art hub.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

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

A part of the world's largest marsh seems to be growing bright red Martian grass.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Intensely colorful calcite pools in Southern China.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Bohol's mysterious brown hills.

A valley of unique erosion patterns lends to a view like nothing on Earth.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.