A modern-day Lascaux cave underneath Paris.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Paris' linguistic guide to the international language of, yes, love.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

One of the city's few vendors selling the Sierra Norte's ancestral beverage lies within a hidden farmers market.

The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.

This amazing collection includes rare stamps from around the world, including fluorescent ones.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

One of the world's largest pyramids stands within El Mirador, the "lost city of the Maya."

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

Few of the many visitors to this resort town know of its hidden Maya ruins.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

These winged Maya figures are the subject of speculation and conspiracies.

An island graveyard with spectacular views of the Caribbean.

Beach instrument turned bed and breakfast.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

Swedish skyscraper with a 90° twist.