Why have you never heard of the second most popular tourist site in New York?

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

An optical illusion found amid a logged redwood forest.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This popular bar has been blurring the line between normal and edgy for more than 75 years.

A beautiful final resting place for some of the noteworthy deceased.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The most famous location in China was home to whole dynasties worth of imperial rulers.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

An ancient neolithic tomb that only sees the sun twice a year.

The ancient tomb acts as a calendar that keeps perfect time.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

A standing relief of a Norman knight whose posture marks him as a Crusader.

Ancient Bronze Age rampart that was used into the middle ages.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

The most loyal of little dogs, or a Victorian era publicity stunt?

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

The Hudson River School comes alive at this palatial estate.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

An vast warehouse of everyday treasures in Berkeley, CA.

Where the alchemists dream of transmuting base metal into gold was actually achieved.