Natural cathedral designed by Italian artist Giuliano Mauri.

Stunning wetlands ablaze with pink lotus flowers.

Described as "the world's most blinging pool."

Open-air museum with an elaborate sculpture garden, stretching for over 70,000 square-meters.

The largest greenhouse in the world is home to over one million types of plants.

Hydraulic systems in an ancient underground Iranian city.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Wonderland replication in progress by one persistent man.

Geothermal waterfalls in Tuscany.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

The fantastic architectural models of a French traveler.

A trash dump made beautiful by nature's power.

This 16th-century monastery has been turned into a surrealist architecture compound.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

Underwater restaurant at the coral reefs of Eilat.

Lived-in building, bedecked with an astonishing array of mirror mosaics.

Personal garden filled with mosaics made of recycled garbage.

A dangling church built over a Colombian gorge.

A precariously perched golden rock defies gravity and brings pilgrims from across Myanmar.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

148 feet long and in the middle of a verdant forest.

Hundreds of Buddhas in a re-discovered Indonesian temple.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.