Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

Whimsical artist house in the New Jersey woods.

Series of storm drains connected to a dark urban legend.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

The home of the Dead Sea Scrolls is an abstract modernist dream.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

A museum dedicated to exhibiting remarkable outsider art.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

A semi-scholarly approach to sex.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

Local lore claims this park is named after a young woman who jumped off a cliff.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

Biblical beasts and endangered animal preservation come together in this Israeli zoo.