Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This miniature take on the Kremlin is one Dutch man's retirement project.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

The world's largest boar is a huge steel titan found at a French rest stop.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Singapore's landscaping project is home to 18 incredible Supertrees.

A church of bones, decorated with 40,000 human skeletons.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Olfactory delights in San Francisco's Botanical Gardens.