One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A popular European tradition makes its way to the states on one of America's most famous bridges.

A semi-scholarly approach to sex.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The famous winding walk at Chartres is surrounded in mystery and myth.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

The founder of a utopian religious community based on the Golden Rule laid his son to rest on this grassy hill.

Nuclear reactor created the plutonium used on Nagasaki.

A collection of colorful dinosaurs hidden in an actual rainforest.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Don't blink or you'll miss it.

This black shoreline is made up of exploded lava particles.

These ancient sacred grounds granted amnesty to those who managed to reach them.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A volcanic landmark located on an Ice age lake bed.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

A volcanic fissure over two miles long and up to 70 feet deep.

Home to the deepest rift anywhere on Earth.