Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A reproduction of earth's many biomes.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Canyon walls shrouded in ferns.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Rustic natural hot springs in the deciduous rain forest.

Quite simply the largest tree in the world (by volume).

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

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

The trials and tribulations of marking Poe's grave.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

An acoustic anomaly with a mysterious cause.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A modernist landscape of water and sci-fi concrete.

This frequently-photographed waterfall takes only a short hike to visit.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.