A chilling disappearance (and rescue) of a child uncovers a geological mystery.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

Time has stopped at the house where Gandhi died.

A blooming house of worship for the masses.

This small cafe aims to empower acid attack victims and stop violence against women in India.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

The beautiful 16th-century stepwell lies in the shadow of a famous fortress.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Now containing the bones of the actual conquistador, instead of someone else.

This stone complex marks the urban center of a lost civilization.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

Three hundred years of preserved Spanish colonial history in San Antonio.

These boots are made for selfies.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.