The largest outdoor art gallery in the Northwest United States.

A 19th-century cabin built into a hollowed-out Sequoia tree.

Quite simply the largest tree in the world (by volume).

The neighborhood of Eagle Rock is named after a gigantic boulder with a shadowy surprise.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

The blinking light atop the iconic landmark has been sending secret messages for decades.

The final resting place of a space program monolith, soon to be unveiled again to the public.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

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

Resting place of Hollywood's immortals is also site of summer film screenings.

Sports history, made in the Arroyo Seco.

Historic funicular railway, believed to be the shortest railroad in the world.

This 16th-century building features a flamenco stage on its ground floor and a torture museum on its upper floors.

Five million people are laid to rest here, more than the population of Madrid itself.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A museum dedicated to the centuries-old cave dwellings that housed marginalized communities on the outskirts of the former capital of Muslim Spain.

This influential Renaissance-era library was once the haunt of kings and monks.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

An automaton perched above an classic clock and watch store

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.