Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

The enigmatic and seldom visited ruins of a Mayan city-state.

An ancient Egyptian temple in the middle of Madrid, Spain.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Pompeii's less famous neighbor is still revealing her secrets.

Ancient snack bar of the Roman Empire re-opened.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.