A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

After much poking and prodding, this island is decidedly not a magnetic anomaly, but it sure is pretty.

Remains of the old fortification along the Western border of the USSR, now an elaborate defense museum.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

Half curiosity cabinet, half late night hotspot, this Brazilian bar is helping turn a dangerous neighborhood around.

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

A colorful street named for the legendary Australian rock band.

Every hour a secret compartment drops from this giant pocket watch, revealing a lovely surprise.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

340-foot statue built to honour the Heroes of the Soviet Union.

The medieval prince founded the first library in Ukraine at Saint Sophia's Cathedral where he was interred.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This derelict superstructure was a very important warning system for the Soviet military.

Figures of unknown origin carved into the surfaces of underground caves.

A huge Megalithic chamber tomb located behind a cafe.

Whitewashed mosque contains the world's largest carpet.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

After being lost for decades, this striking mural depicting the atomic bomb covers the wall of a busy Tokyo metro station.