Tiki luxury on Nob Hill.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A modern mechanical planetary system, part of a 10,000 year clock.

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

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

San Francisco's newly reopened hands-on science museum.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

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

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Olfactory delights in San Francisco's Botanical Gardens.

A century and a half of research in the sciences and natural history, still going strong.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

A library and museum dedicated to typography.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

A hidden subterranean installation offers a view of the sky.

In this century-old literary safehouse, print is alive and well.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

A varied collection of brains in alcohol.

Twisted buildings adorn the banks of the Rhine river.

Climb inside an iron crystal magnified 165 billion times its normal size.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."