A 125-meter long "tribute to the Brazilian people."

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

The Guardian of Tallinn.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

This no man's land slicing through the island is strewn with abandoned relics of another time.

Once part of an ancient international harbor, it's now an all-you-can-eat shrimp buffet for flamingos and other water birds.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

These temples are among the oldest free-standing stone buildings in the world.

Abandoned Roman Catholic chapel abused by Satanists before being restored.

Hidden beneath a restaurant, underground tunnels tell the story of Malta’s tragic role in World War II.

Dynastic Home of the De Piro Family.

Ancient mysterious ruts carved in the bedrock.

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

A centuries-old forgotten underworld lies beneath Malta.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

A museum marks and documents the site of the Titanic's launch.

Northern Ireland's Brobdingnagian stepping stones.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.