A stunning mosque owes its design to an Ottoman ruler nicknamed "the Butcher."

Deep in the Negev Desert, the world's tallest solar tower looks like a sight straight out of science fiction.

This subterranean funicular is one of the world's smallest subways.

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

Mexico City's residents are being watched by this state surveillance headquarters, designed by architects with a flair for intimidation.

A grand entrance to one of the world's smallest Chinatowns.

A curious museum of old video game consoles hidden in the back of a store.

Psychedelic murals coat the inside of a nondescript research library.

It's believed this golden brick is part of the legendary lost Aztec treasure.

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

A colorful "forest" made entirely from three tons of recycled plastic waste.

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

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

Twelve natural mummies are displayed in the crypt of this former monastery school.

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

A close look at the church's walls reveals pieces of Mexico's history.

This museum houses two of Mexico's most impressive Aztec monoliths.

Get a privileged view over Mexico City's Historic Center from a terrace right in its heart.

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

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.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

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

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.