The former locus of Boston's high culture has been shuttered and buried for over 70 years.

It's not a typo, now say it five times fast!

This extremely narrow tenement boasts a maximum occupancy of just two.

A miraculous natural phenomenon known as "the spring that breathes."

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This haunting stone chasm is a hotbed of mossy rock and English legend.