The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Four metal statues of massive animal penises stand outside the university's Animal Sciences building.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

Instead of fruit, the branches of this tree are brimming with hopes and dreams.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This woodland architectural installation acts as a camera obscura for the heavens.

Treehouse motel and treehouse-building school.

What happened to the three lighthouse keepers who vanished from this place remains a mystery over a century later.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

Lighthouse-cum-columbarium where "Nor'easters" and grandma go to die.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

One part local history, 99 parts gruesome haunted house.