Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

A house mixing elements of Chinese and Mexican architecture stands as a tribute to the Chinese-Mexican bishop who lived here.

A series of mosaics in Mexico City's Historic Center celebrate the Basque Country's "eighth province"—its diaspora.

A book bound in the skin of an infamous criminal, along with countless other specimens.

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

Though it's not the largest, this one-kilometer outdoor market is reportedly the longest in Europe.

In 2008, this Mexico City metro station was the site of an hours-long fight between emo, punk, and goth groups.

The ruins of New Zealand's largest classical-style church.

A glacier pocked with ice caves and surrounded by rainforests.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

The first Chinese student to graduate from a European university.

One of the oldest hospitals in the Americas is now decorated in hallucinatory murals.

A bizarre stone beast lurks on the beach of a popular tourist island.

The United Kingdom's smallest working cathedral also serves as a quaint bed and breakfast.

This stately estate house features a tower covered in a bright, modern mural.

In 1396, two Scottish clans that had been violently feuding for centuries finally faced off in a bloody battle in this park.

A rare remnant of an exposition that took place nearby at the end of the 19th-century.

After several moves across Mexico City, these two statues found a home in Mestizaje Park.

An ode to a chess-loving diplomat.

Where layer cakes tower above one’s head and there is never a shortage of icing.

On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

The remains of an Aztec school and various intriguing artifacts lie below a modern cultural center.

This tiny, tucked-away eatery reflects the history of Mexico's Lebanese immigrants.

This one-window stand has been home to a giant vat of slowly simmering meats and an array of unique tacos for almost 50 years.