Australia's largest medical museum featuring a 19th-century pharmacy.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

Twelve sculptures designed to make their best showing with the coming or going of the sun.

Clusters of huge boulders in the Australian Outback.

Not a single witness can attest to the creation of the world's largest geoglyph.

A historic hotel on the edge of the Australian outback.

Lonely industrial sculptures in South Australia created by a mechanic turned artist.

The Australian lorikeets that like to tie one on in an annual drinking binge.

A wonder of natural limestone formations etched by millions of years of natural interaction between rainfall and rock and air.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The rocks in this arid basin leave trails of movement behind them.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Towering basalt columns, a creation of fire and ice.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A winding path built in secret on the edge of the continent.

An antiquated German apothecary on Chicago's North Side.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

A six-story-tall golden pyramid, surrounded by a moat.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Location of a reliquary containing bone fragments of 18 saints.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

A fine, large-aperture telescope available for public use.

A long lost multi-cultural music venue used to reside in the bottom floor of Chicago's Flat Iron Building.