One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

One of the largest underground systems runs under Canada's largest urban center.

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

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

One kilometer of thick brass rod laid out before your eyes.

Try not to get slimed in Tribeca.

More gold than anywhere else, ever.

Home to items never before seen by the public.

A spiritual vortex among the red rocks in Sedona.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Abandoned silver mine strewn with wrecked and twisted structures.

The 10,000 Torii shrine.

Hot springs monkey spa in the middle of Hell's Valley.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

This little replica of Lady Liberty provides a bit of NYC in a Japanese city.

This ancient temple is set up to take you on a pilgrimage of self.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

This former small town was destroyed not by the motor oil it sprayed the ground with but by the toxic waste that was added.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

This is not your typical jungle gym.

A chessmaster's dream destination.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.