The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

A unrivaled and rather horrifying collection of wax dermatological models.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

Statue of death tucked in the University of Medicine courtyard.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

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

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

This French colonial post office is arguably the grandest in all of Southeast Asia.

Walk through a clothing store, across a courtyard, and up several flights of stairs for delicious coffee with a side of beautiful views.

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

World's largest cave was only discovered in 1991, and now offers tours to the public.

An extravagant monument to an extravagantly unpopular Emperor.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

Super-heavy Nazi architectural experiment.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A surreal museum of extraordinary industrial objects.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.