In a time before lifeguards, this house was a sanctuary for the shipwrecked.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

St. Augustine's record-setting narrow street was designed to protect against pirates.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Location of a reliquary containing bone fragments of 18 saints.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

European castle ruins in an American state park are actually the product of death and grief.

This kitschy tavern is also home to rare early editions of "Treasure Island."

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

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

Less a museum than a bizarre fantasy world created by artists and engineers.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

Community bookshelf of 25-foot-tall book spines.

This otherworldly church spire reaches up toward the heavens.

Two Ming Dynasty lion statues guard the entrance to the journalism school.

The iconic remains of the original Academic Hall that burned down in 1892.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

Like Stonehenge, but with boats and oodles more charm.