A masterpiece in Golden Gate Park by virtue of the artist’s debt.

The only visible piece of San Francisco's most famous shipwreck.

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

Nuclear waste dump site now an environmental sanctuary.

Golden Gate Park's historic collection of plants.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

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

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

Olfactory delights in San Francisco's Botanical Gardens.

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

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

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

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

This Himalayan airport provides one of the most difficult landings in the world.

The nation’s first institution dedicated to the conservation of Bhutanese textiles.

A stupa built to protect Bhutan from evil forces and help bring peace to the world.

According to legend, this temple was built to pin down the body of a demoness who lay across the Himalayas.

Legend has it a sacred treasure hidden by an ancient guru was revealed with a burning butter lamp from these waters.

This Bhutanese site is one of eight sacred locales established by a revered 14th-century Buddhist master.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

A battle between nature and architecture in the Cambodian jungle.

The largest and, arguably, most scenic fortress in Bhutan.

This penis-focused monastery is dedicated to Buddhism's "Divine Madman."

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.