Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

Take a drunken tour inside the world's largest known geode.

A bizarre house filled with an astounding array of collections.

This freshwater spring fills with 10,000 gallons of water per minute.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

This historic Illinois "Muffler Man" has been converted from axe-touting lumberjack to rocket-wielding space ace.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.