History is on display in this hall, which has served as the seat of city government for centuries.

Its most enigmatic sculpture is a giantess with a ghostly face on her knee.

A bullet-scarred monastery chronicles Mexico's turbulent history of foreign invasions.

Its exhibits are dedicated to educating the public about state terrorism in Mexico.

This covert museum showcases booties worn by a rescue dog and slippers owned by Queen Elizabeth II.

The underground mall's skylights look like they could be part of a spaceship.

One of the world's richest men bought this former paper factory and transformed it into a mall.

Its incredible collections are dedicated to preserving Mexico's film history.

The museum houses "the most studied meteorite in history," among other geological oddities.

This industrial Art Nouveau gem is a historic hotspot for Mexican counterculture.

Psychedelic murals coat the inside of a nondescript research library.

You can release a young butterfly at this beautiful indoor garden.

The only castle in North America to ever house European sovereigns.

This rare, carefully curated collection showcases the history of neon inside a grandiose Elks lodge.

Hundreds of handmade critters fill this tiny window gallery in the heart of Portland's Alberta Arts District.

Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

The small candy-colored ride is the last rooftop Ferris wheel in Tokyo.

Some big-name visitors have patronized this small-town library named for an oil man's daughter.

A single room pays homage to the prodigious achievements of the 30th President of the United States.

The two writers famously didn't come to blows over the Oxford comma.

The mighty room where the poet spent most of her life is available to rent for an hour or two.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.