Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

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

The stoutest tree in the world.

Inside this mountain lies several kilometers of breathtaking caves.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

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

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

Mexico's astounding mummy museum with "the world's smallest mummy."

This beautifully deceptive waterfall is something far different from what it appears to be.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

The only castle in North America to ever house European sovereigns.

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

Extraordinary sculpture garden created by an eccentric English poet.

Part bookstore, part café, and part forest.