This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

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

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

This small oxbow lake has rare giant river otters and some Seussian-sounding birds.

A kitschy Italian medieval-style castle incongruously located amidst one of the most historic towns in the Peruvian Amazon.

The depictions of slaughter are surprisingly detailed at this mysterious ancient site.