The glacier tucked within a New Zealand rainforest.

Buy your fish and have it cooked to order in this bustling, eight-floor seafood market.

Although resembling a grand Buddhist temple, this structure is actually the largest mosque in China.

An ancient fortification lives on in this Chinese city.

An out-of-place slice of France, smack in the middle of Shanghai.

The ancient latrines of the Greeks, in all their public glory.

Legend says this sacred tree was a gift from goddess Athena.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bears of Bern have been a city highlight for over 500 years.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A marvel of Byzantine engineering under the streets of Istanbul.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

The glowing blue Nymphaeum of Emperor Tiberius.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

Pompeii's less famous neighbor is still revealing her secrets.

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

There has been an astronomical clock on this spot since the 14th century.

Hundreds of hidden passageways weave through the old quarters of Lyon.

This beautifully deceptive waterfall is something far different from what it appears to be.