The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

Hundreds of notes give thanks to the patron saint of lost causes.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

The oldest surviving synagogue in New York City is now a soaring art space.

Relics given to a Manhattan church to avoid seizure by the Italian government.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Try not to get slimed in Tribeca.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This small New York museum celebrates the mountainous artwork of a Russian mystic.

Cryptic messages embedded in the New York City sidewalk.

An artist's cute bronze subway sculptures belie his violent artistic past.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A celebration of capitalism in Midtown.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Walk through depictions of the torture inflicted on those who go to Buddhist hell.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

A terrific purveyor of natural history objects and curios.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

Prehistoric animals decorate this popular outdoor park.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.