The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

One man's homage to the sun continues to grow like a glass fractal.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

America's most famous piece of self-built architecture.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A battle between nature and architecture in the Cambodian jungle.

The first declared National Monument in the United States.

Medical and zoological curiosities for sale.

Monasteries on rock pillars, once accessible only by frayed ropes.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.