Travel.  Ok this will be about travel...

First, familiarize yourself with the great travelers; Hemingway,, Ibn Battuta, Marco Polo, Richard Burton.

We will start by counting how many cities Ibn Battuta (a 14th century Morrocco explorer) had visited.

MAGHREB:  19 cities

ARAB PENINSULA-17

ARAB MASHRIQ-  44

PERSIA AND IRAQ:    20

NILE VALLEY:  1 (Suakin, Sudan)

HORN OF AFRICA:   2

SWAHILI COAST:  2

ANATOLIA:    40

SPAIN AND ANDALUSIA-5

CENTRAL ASIA:  23

SOUTH ASIA: 23 (he visited the maldives for example:

SE ASIA:   1

CHINA-2

MALI EMPIRE AND WEST AFRICA:  6

TOTAL:  Over 40 modern day countries, and 199 major cities.  Not bad for the 14th century.