Murals made with millions of colorful stones adorn the abandoned building.

Its most enigmatic sculpture is a giantess with a ghostly face on her knee.

This underground museum highlights the history of Mexico City's subway system.

The collection of intricate sculptures includes one carved from a mammoth's tusk

A Volkswagen Beetle decorated with millions of beads connects Mexico's past and future.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

This architectural wonder of Mexico City houses several art schools and national research centers.

The extremely grey columns of one of Mexico City's most iconic beltways are slowly gaining a bit of color.

The ruins of the "place of the cloud snake" sit in the middle of an urban environment.

In Chapultepec Park there is a pavilion gifted to Mexico from South Korea to honor the 1968 Summer Olympics.

A roadway designed for a visiting monarch.

These shopping center benches are actually a modern art installation.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

A jazz band formed by African water animals in the heart of Flemish Brabant.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

This forgotten chalk mine was reopened thanks to a massive effort from the local community.

The fragmented remains of a massive public bath connected to the city's water supply.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

A six-ton wedding present for the King of the Scots.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.