Perhaps the most spectacular grotto along the Algarve coastline.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

This Stonehenge-inspired solar calendar stands alongside a landfill, in the middle of the Nevada desert.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

A private Las Vegas horse ranch adorned with whimsical artwork.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

These markers are used to determine the ground stability of the Strip.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.