Megachurch turned Catholic church comprised of 10,000 glass panes.

A multimedia experience that chronicles the atrocities of racism.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

This Seattle store is packed with all sorts of curious creatures and creations.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

The first park built over a freeway is a brutalist masterwork.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A wall of chewing gum moonlights as collective art.

Couple's personal collection of pinball machines turned public pinball museum.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

The grandson of a Kiowa chief created what has become the iconic symbol of a city on the Plains.

A serene temple with stunning stained glass hides in downtown Dallas.

An overlooked and unassuming engineering marvel.

Golden Gate Park's historic collection of plants.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

An artsy hidden staircase leads to breathtaking views of San Francisco.