One man's attempt to create an artistic wonder on a run-down block in Detroit.

This tiny abode has been covered in the art of the little old lady who made her life and living there.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

66,000 pieces of art, donated by one of the world's richest men.

Part bookstore, part café, and part forest.

Frida Kahlo's childhood home, now a museum of her life and works.

These azure waters were thought to lead to the Mayan Underworld.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

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

Two stunning 17th-century libraries and a cabinet of curiosities.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This doorless 20th-century elevator doesn't stop or slow down.

Macabre astrological automaton clock dating to the late 1400s.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A mocking tribute to the past and modern leadership of Prague.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

Looming communist pillar with a Czech twist.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.