Manatees congregate around a power plant's discharge canal where the water is especially warm.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

The largest retailer of seashells in the world.

A hidden beach at the end of a tunnel of mangrove trees.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

This German bone house contains the remains of some 20,000 souls.

It's said the devil used this mushroom rock as a table for a late-night meal.

The many—66 to be exact—faces of the German forest.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The middle finger of modernity.

Drink wine handed out through a window as part of an age-old tradition.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

The largest underground lake in Europe.