Built during the reign of Emperor Vespasian in the 1st century AD, for an audience of 22,000, Pula’s three-storey Roman amphitheatre is one of the best preserved in the world and the sixth largest in existence. Every year, the arena plays host to Pula’s annual summer festival which brings in famous names from across the globe.

Reopened at the very site of its original discovery, the ruins of this Roman Temple of Mithras are open for public visits in the basement of Bloomberg's European headquarters at number 12 Walbrook. There are also a few other exhibitions that include both historic artefacts and contemporary artwork. Entrance is free of charge.

Located on the South Bank, right next to London Eye, SEA LIFE London Aquarium harbours one of Europe’s largest collections of global marine life covering more than 500 species, 14 themed areas and two million litres of water. The exhibition includes favourites such as seahorses, octopuses, zebra sharks and clownfish. There are also interactive experiences, so you can see diving displays, watch the sharks being fed, or even try and feed the stingrays yourself. And don't forget to take a dive 'under the ocean' in the glass tunnel walkway.