As someone with the finances or space for reams of Dwarven Forge-style scenery to illustrate my fantasy roleplaying games, I love gaming tiles, battle mats etc for their ease of storage, instant compatibility, and versatility.
My most recent purchase was a pack of Adventure Realms' fantastic, double-sided tiles themed to "town and wilderness", with urban layouts on one side of the 8" by 8" tiles and the great outdoors on the other.
The tiles are made on thick card, are gloss laminated to be compatible with dry-wipe marker pens, and come in packs of 16.
In this new set one side of the tiles has 16 "top down view castle tiles, ideal for quickly putting together a city wall or castle complex for your adventurers to explore", while flip-side boasts 16 dungeon tiles.
The crowdfunding campaign is looking to raise £1,000 by October 2, so check out its Kickstarter page to see the various rewards levels (which include buying multiple packs, PDFs etc)