This futuristic observatory at the top of the Pyrénées offers unrivaled views.

The deserted pirate-themed restaurant still entices explorers.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

A chapel on a volcanic core, marking the end of a successful journey.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

A giant portrait of an ancient king looms over the river.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A stone circle on the slopes of a Caribbean volcano commemorates the leader of an anti-slavery uprising.

A desert in southeast Asia, complete with a beautiful lake covered in lotus flowers.

This striking landscape in northern Vietnam contains both geological and archaeological wonders.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.