This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This quiet area of Yunnan Province annually transforms into an unbelievable sea of yellow flowers.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

Giant granite sculptures representing family on the northern coast of Spain.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

The world's largest neutrino telescope searches for secrets of the universe at the South Pole.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

A no-frills, DIY nature preserve manned by a U.S. expat who has dedicated his life to turtle conservation.

Over 4,700 miles of trees being planted to hold back the desert.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Ancient Greek oracle of the dead.

Week-long block party becomes a competition for the best decorated street.

Known for the tunnel that leads visitors to the water.

The world's largest bioluminescent area was undiscovered by science until 2005.

Cliffside houses provide a spectacular view from their perch above the valley.

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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

The Uros people live on floating reed islands in lake Titicaca.

A fairy tale castle in modern Rome.

The famous author's cottage hideaway.

Rock-cut cave complex filled with ancient Buddhist artwork.