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

The solemn exterior conceals an opulent interior of this 17th century church.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

An exquisite Baroque church in Vienna's old town.

The Habsburgs' royal collections of art and wonders.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The beautiful baroque library of the Hapsburg empire.

The USSR’s Conquest of Nature lead to the domestication of many moose—no squirrel.

The reason for the strange contortions in the trunks of these "drunken" pine trees in Russia is still a mystery.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

Stunning examples of Russia's 18th-century wooden architecture.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

One of the oldest masonic museums in Paris.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A museum of magic with a Sadist past.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The very center of Paris is surrounded by a bevy of strange good luck rituals.