One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).

Each of these 87 large stones has a unique message. Together, they form part of the Minnesota Military Family Tribute.

A 115-year-old restored German dining hall awaits those who venture beneath the Minnesota State Capitol.

This small, but beautiful waterfall has attracted visits from artists, composers, and two United States presidents.

This lab's maddening silence is good for business but bad for sanity.

Hub of Scandinavian culture in a Minneapolis deli.

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

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

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

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

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

Sample sweets at an Art Nouveau candy shop that's been in business since 1874.

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

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

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

A bronze statue of the famed Prussian naturalist commemorates the year he spent in Mexico.

A tribute to the 20th-century ball that cast a spotlight on Mexico’s LGBTQ community.

Cool down and fill up after visiting Teotihuacán at this bar and restaurant in a deep, underground cave.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

This scenic cable car ride glides 100 feet above Mexico City.

The world's tallest carillon is located at the top of this skyscraper in Mexico City.

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