Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

This abandoned church in central Lyon is missing its front stairs.

This hidden garden boasts amazing views of Lyon.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

A tiled, multi-level garden of survival in Lyon.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Hundreds of hidden passageways weave through the old quarters of Lyon.

An extravagant monument to an extravagantly unpopular Emperor.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

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

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

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

This museum is rotten with a century of wax medical deformities.

Renaissance villa and gardens complete with a tormented colossus.

A submerged archeological park still holds the wonders of a Roman Sodom.

A 16th-century horror show built in a lovely Italian garden.

Elevated freight railway turned wildly successful urban park.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.