This subterranean oyster house has been the pearl of Grand Central Station since 1913.

The largest geyser field in the southern hemisphere is a spectacular sight.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Palace where the nearly un-killable Rasputin was murdered.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

Quito's historic, main square dates back to the 16th century.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

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.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

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.