An ancient underground cultic temple where sunlight penetrates on the summer solstice.

These mosaics were created more than half a millennium ago and feature various animals.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A historic Montreal market that was the city's agricultural hub for over century.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

A historic shipbuilding town is home to a sail-through fish-and-chips shop.

The raised stones in the middle of this road through Culross are relics of a 17th-century class divide.

One of the largest statues in Israel was erected to protest pollution.

Tracking the 1,500-year history of Korea's star cabbage.

Its humdrum facade only adds to its electrifying appeal: a rooftop with panoramic views of a shapeshifting metropolis.

This pagoda was once the central feature of a Buddhist temple that no longer exists.

The site of the last royal wedding in Korea.

All that remains of an ancient royal palace is a water channel that was used for drinking games.

This grand temple complex from the Old Silla era of Korea is home to a stone pagoda that was build in the 7th century.

An early Korean refrigerator.

This human-made pond is part of a Korean palace complex first built in the 7th century.

Numerical symbolism abound at East Asia's oldest observatory.

The supreme shrine of the state.

Deep in the Negev Desert, the world's tallest solar tower looks like a sight straight out of science fiction.