This ruined travelers shelter sits abandoned in a desolate bog of Flow Country.

An 18th-century lighthouse built on a 16th-century castle is now a monument to the maritime beacons of Scotland.

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

California's most comprehensive horticultural library.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A small Richmond island dotted with the remnants of hundreds of years of history.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A former major munitions plant that has been converted into a sprawling art space.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

Headquarters of the legendary clairvoyant's readings, spiritual hospital, and massage school.

Extraordinary objects lurk in this quintessential regional museum.

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

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

Exact replica of the ancient monument, but much, much lighter.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.