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.

The famous artist couple lived and worked here, in two different houses connected by a bridge.

Frida Kahlo's childhood home, now a museum of her life and works.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

66,000 pieces of art, donated by one of the world's richest men.

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

This mosaic made out of books represents one of Colonial Mexico's most important literary figures.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

A trompe l'oeil mural remembers the original colonial building that once stood here.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

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

The shortest river in America flows for just 201 feet.

"Polynesia on the Plains."

The formidable fowl can be found standing near an isolated hiking path.

This museum is dedicated to telling the story of dinosaurs from a creationist perspective. 

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Inside a busy metro station, an impressive mural depicts the prehispanic city of Tenochtitlán.

After being lost for nearly a century, this historic bell finally returned home after its mysterious theft.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.