The crumbling remnants of this 19th-century quarantine hospital hint at the touristy island's darker past.

This small fort played a huge role defending Puerto Rico’s capital city.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

On a clear day, you can see all the way to the Virgin Islands from the top of this observation tower built in the 1960s.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

When you can afford only half a road, you build only half a road.

This lake sits on an estimated 4 million tons of salt.

A statue in the Texas town that proudly calls itself the killer bee capital of the world.

The tree is thought to be the oldest oak in Texas and was once crowned state champion for its monumental size.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

High in the Rockies the third largest statue in the U.S. opens her welcoming arms, and lights up the night sky.

New fungal and bacterial species call this deadly lake home.

One of the last socialist halls still standing in the United States.

A giant roadside black bird marks the location of this eclectic local mall.

According to legend, you must remain completely silent while passing this man-made mound or suffer the consequences.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A glimpse into the "Logging Capital of the World" at a time when there was far more forest and far less machinery.

Shoreline strewn with the remains of ghostly fallen trees.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.