All of Chicago's wood-paved streets are long gone but two alleys remain.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

This historic hotel invented the chocolate brownie.

These abandoned grain silos and tunnels are an urban exploration dream.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

A hollow cement depiction of time's inexorable effect on the human body.

This turn of the century masterpiece has a mysterious goaty interloper.

Gold Rush-era tombstones line the park's paths.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The only theatre in the world constructed specifically for sound movement.

Considered one of the most haunted places in Europe, this 800-year-old castle was home to noble prisoners.

This painted marvel is San Francisco's 400-foot ode to urban biking.

The oldest dim sum restaurant in the United States is a nostalgic jewel.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

Amazing meticulous gardens of personal wood carvings, Hydrangea, Canna, and many other flowers.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

A walk down memory lane in the heart of one of San Francisco's most notorious neighborhoods.

The remains of a 12th-century chapter house in Golden Gate Park.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

Half of a house.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

A promotional sun clock on the site of San Francisco's great raceway.