Thousands of well-dressed mummies below a monastery.

The world's most active stratovolcano is almost always erupting.

2300-year-old Roman road connecting the empire.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This Tang Dynasty behemoth is the biggest Buddha in the world.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

Memorial to the father of the Republic of China.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

There must be a pun in this haystack somewhere...

Love, knishes, and best wishes from this legendary Lower East Side bakery.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The most confusing clock in New York.

An epic sculpture depicting a wagon and straining oxen.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

The site of the deadly Triangle Shirtwaist Factory Fire.

Elevated freight railway turned wildly successful urban park.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.