Not-so-fearsome tiny trolls live under this wooden train trestle in Portland.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

San Francisco's most expensive hotel suite includes a secret passageway rumored to have been used by JFK.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A brass and marble scale model of the solar system embedded in the concrete.

There’s a special club house at the top for the bell ringers.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

These markers are used to determine the ground stability of the Strip.

A layered tribute to the work of mosaicist Isaiah Zagar.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

A collection of over 15,000 zines works to preserve DIY publishing culture.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

Delightful disarray of found objects and clutter.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

A peaceful, unique botanical garden complete with waterfalls, mini islands, and swans.

The history of the traveling carnival is remembered by this sprawling collection of vintage wagons, games, and rides.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Human skulls and a stuffed goat made into a rocking chair can be found at this strange little store.