Swim alongside softshell turtles in these turquoise waters within the Cuatrociénegas Biosphere Reserve.

A series of abstract sculptures pop up from an otherworldly volcanic landscape.

This mid-century mural portrays humankind's spiritual and scientific journey.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

One of the oldest Christian churches still standing in the Americas, and almost certainly Mexico's oldest in continuous use.

Diego Rivera's massive tiled fountain and failed infrastructure project.

The only castle in North America to ever house European sovereigns.

Part bookstore, part café, and part forest.

This industrial Art Nouveau gem is a historic hotspot for Mexican counterculture.

The museum houses "the most studied meteorite in history," among other geological oddities.

The home of two of Scotland's most important artists has been reassembled in the Hunterian Art Gallery.

The abandoned transportation hub hides within the Glasgow attraction it once served.

A ceramic postbox where visitors can post original poems and creative messages.

These ruins have been linked to a sherbet factory that exploded, but the story may be entirely fictional.