The remains of the oldest bone-headed dinosaur in North America.

Known as "Toronto's Flatiron."

The remains of a once-famous hotel that also acted as an artist colony.

A space-age 1950s pavilion on a secluded path is full of Toronto history surprises.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

A spiritual sanctuary in a natural cave.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

A rococo room covered entirely in porcelain originally constructed for another royal residence.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

An impressive bridge over a ravine also served as an aqueduct.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.

This Seattle joint serves food inside an old train car once used by FDR.

An enormous pair of straw sandals woven in the traditional way—to keep demons at bay.

The legendary birthplace of the Japanese maneki-neko is dotted with hundreds of lucky beckoning cats.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

Peace Park and the Atomic Bomb Dome.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

The best place for scenic views of the DMZ and North Korea.

Secret North Korean passage discovered below the world's most dangerous border.