Two gravestones clasp hands over the religious divide.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

A strange house built only at night, with rumored mystic inspiration.

A series of gun powder chambers currently hidden from view within Nobbys Headland in Newcastle, Australia.

Where the line between entertainment and aerospace blurs.

An old town theater converted into a celebration of the hobo legacy.

The final resting place of a space program monolith.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

The remains of a ruined mansion memorialize the 1906 earthquake.

Where beautiful signs live on forever.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

A deadly ancient portal to the underworld.

Seaside ruins of a settlement that date back to the first century B.C.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

The long, arduous journey of the stones of the Abbey of New Clairvaux.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

High-end antique collection housed in a centuries-old church.

Self-sufficient greenhouse floating on the Hudson River.