An abandoned, unfinished mansion on grounds strewn with lava rocks.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

A large sculptural artwork and garden in Escondido, California.

An inconspicuous footbridge beloved by San Diego locals.

Rustic natural hot springs in the deciduous rain forest.

The second tallest railway trestle bridge in America.

A whimsical village of unique treehouses resides in a Washington forest.

Bonsai trees that are up to a thousand years old.

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

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

What's that on the side of that building? Va Va Voom, it's Bettie!

A nondescript Seattle restaurant inherited a piece of European history.

This former coal gasification plant found a curious second life as a popular public park.

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.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

Read a book next to a Midtown waterfall.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

With over 12,000 different species of plants, this botanical garden is Japan's oldest and most diverse.

Unusual hexagonal rocks formed by cooling lava named for their resemblance to traditional Japanese tatami mats.