The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

At this Austin dive bar, it's been Christmas every day for more than 50 years.

These roaring primates were considered a divine creature in the cosmology of the Maya.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

One of Mexico's rare urban natural parks features waterfalls and a working fish farm.

An indigenous take on European design creates a stunning visual overload.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

This immense scene of a cosmic battle between a jaguar and serpent illustrates the Aztec concept of the duality of life.

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

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

The biggest drug trafficking passage between Mexico and the U.S.

255 feet of suds, scrubbers, and blow dryers.

A curious statue fit for a mad tea party.

Once seen as a bit of an eyesore, this sculpture has become a staple of downtown Houston.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

The world-record holder for the longest bridge stretching continuously over water.

Beach instrument turned bed and breakfast.

The world's largest squirrel statue clutches a pecan bigger than your head.

Look closely and you’ll notice that the color changes a third of the way up the tower.