A grassy pyramid named after a French battle.

Burbling away in refrigerators are 105 sourdough starters from around the world.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Go inside to really appreciate this 500-year-old technological masterpiece.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

For hundreds of years, this huge figure has been blessing visitors before they explore his body.

Pilgrimage site for star-crossed lovers.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

A unique seaside cave where Aleister Crowley faked his own death.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This splendid tomb may look fantastic, but there's nothing in it...

A spherical "micro-nation" in the heart of Vienna.

A little sculpture with a large wardrobe.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

Climb inside an iron crystal magnified 165 billion times its normal size.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The celebrated eyesore created by starry-eyed sweethearts.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This bridge was constructed from the rubble of the infamous Bastille.