A lot of D&D and Pathfinder combats are static slug-fests that take place in featureless, rectangular, often nearly empty chambers. Shake that up with these items for the bad guys to use… or the good guys to use first. Outside combat, some of these items might be used when searching the room or to help navigate to other parts of the dungeon.

Decide what kind of a location your dungeon is. When creating a location, roll 1d100 a few times to find things to add to the space to create potential havoc or drama. In game design terms, these are called “affordances”. You might even let players spend a point of luck to “notice” something you didn’t plan for. Or they can just ask “Is there something I can knock over?” with hopeful, puppy dog eyes.

Remember that dungeons and ruins are not perfect places. Not only should they have old furnishings (and new, if the place is still occupied), they should have imperfections like leaking water, cracks, rubble, loose stonework, plant growth, and such.

1d100	Item and Effect
01	Bookcase, shelves, or wardrobe you can knock over or use as a barricade.
02	Brazier you can knock over, spilling hot charcoal and possibly starting a fire.
03	Bags of grain or beans you can slash and spill or pick up and throw.
04	Loose rubble you can throw, cause a stumble, or start a rock slide.
05	Chandelier you can swing from or cut the rope to drop.
06	Stairs you can use to get the high ground.
07	Table or altar you can use to get the high ground or knock over or use as a barricade.
08	Chair, bench, or stool you can throw or bludgeon with.
09	Large statue you can topple or climb on top of to reach something.
10	Barrels or small casks you can roll or spill the contents of.
11	Bed or pallet you can shove or use as a barricade.
12	Candelabra, candlesticks, or candles you can throw or use to set a fire.
13	Idols you can seize or throw to shock or distract worshipers.
14	Casket or coffin you can use as a barricade.
15	Bottles, jars, urns, bones, tools, etc. you can throw or scatter.
16	Cask of caltrops you can scatter.
17	Open well or pool you can push someone into.
18	Sharp spikes, thorn bush, etc. you can push someone into.
19	Spinning wheel, butter churn, washboard, etc. implements you can throw or knock over.
20	Washstand, tub, bucket, commode chair, etc. furniture you can throw or knock over.
21	Chest of clothing you can knock over or use as a disguise or find a clue.
22	Cauldron or trough you can knock over, spilling boiling water or mysterious chemicals.
23	Crevice or niche you can hide in.
24	Sconce you can use to hold a torch or operate a secret door.
25	Lever, pull, or wheel to open and close a valve somewhere.
26	Bell, horn, or gong to raise an alarm.
27	Musical instruments you can throw or use to create noise.
28	Stone column (whole or broken), you can hide behind or stand on.
29	Firewood or charcoal you can throw or scatter or start on fire.
30	Leather hides or fabric you can hide under or use for concealment.
31	Pile of straw you can hide in or scatter.
32	Urns, jugs, ewers, etc. pottery you can smash or scatter.
33	Fireplace you can knock someone into or get a firebrand from.
34	Guillotine, stocks, breaking wheel, iron maiden, etc.
35	Drain that goes into underground river you can enter or get rid of liquid.
36	Portcullis you can raise or drop with a rope.
37	Gate you can swing open or closed.
38	Murder holes to shoot arrows or pour liquids into another chamber.
39	Pile of lead or iron metal ore you can throw or scatter or use as a weight.
40	Bridge or narrow walkway you can destroy or throw someone off.
41	Rope or wooden bridge you can cut or catch on fire.
42	Area with railing you can jump or obstruct enemies.
43	Spiral stair to balcony or mezzanine where you can hide or attack from.
44	Tapestries or drapes you can cut down or hide behind.
45	Storage of various items useful in myriad ways (string, spikes, etc.)
46	Ladder you can use to climb up or down or knock over.
47	Cask of molasses or animal glue you can spill to cause stickiness.
48	Cask of oil you can spill to cause slips or start a fire.
49	A huge vat, small dam, etc. you can burst to flood the chamber.
50	Debris (rocks, wood, sand), you can throw or pile up to stand on or use as weight.
51	Pit you can push someone into, perhaps with a weak edge or narrow ledge to navigate.
52	A slide or chute used to deliver things to another area of the dungeon that you can use.
53	Cages or a caged beast you can release.
54	Chained beast you can’t release easily but can throw someone to.
55	Mud, silt, slime, or ice that becomes extremely slick when wet.
56	Crystal formation or moss that has weird effects in the presence of magic or if touched.
57	Wild magic or dead magic zone.
58	Fragile magic items (glass, dust, etc.) you can destroy that create mist, penalties, etc.
59	Storage for weapons and/or armor and shields you can use.
60	Cable or rope between two areas you can use as a zip line.
61	Escape route, perhaps secret, one-way, or lockable from the other side.
62	Trap you can trigger, such as a dropping cage or swinging blade.
63	Mushrooms that explode if touched that you can direct against enemies.
64	Sheep or other harmless creatures that panic easily.
65	Alchemist supplies you can damage to create a random acid, fire, etc.
66	Rocks, snow, ore, coal, or ice you can use to cause an avalanche.
67	Bee hive, wasp nest, etc. you can dislodge to cause trouble.
68	Pull chain that activates a portal to a howling wind, torrent of water, etc.
69	Crumbling ceiling or roof you can collapse by knocking a shaky support.
70	Crumbling floor or wall you can collapse by throwing someone at it.
71	Geyser, hot vent, etc. you can throw someone onto when it goes off.
72	Room partition or knee wall you can knock down, jump, or hide behind.
73	Pile of rope or chain you can use to fasten things or climb.
74	Ten-foot pole you can use to prod things or prop something up or shinny up.
75	Hanging chain or rope you can climb or swing from, perhaps attached to bells.
76	Articulated sea serpent skeleton hanging from the ceiling that you can drop on someone.
77	Sinkhole you can throw someone into.
78	Stalactites or huge icicles you can dislodge and/or avoid.
79	Magic candles that damage or curse if put out, which you can push someone into.
80	Magic lodestone you can shove an armored opponent at to trap them.
81	Hot spring bath taking up most of the room, so any combat must take place in it.
82	Piles of rotting corpses you can push over onto someone.
83	Swings you must use to cross the room to avoid the acid pool.
84	Stone blocks you can throw or use to build a staircase to another area.
85	Screen or fence you can climb to access another area.
86	Island in a chasm from which enemies shoot arrows at you.
87	Narrow ledge over a chasm you must walk to reach another area.
88	Magic items you can choose from, but the enemy gets the other to use.
89	Fixed magic objects that you and the enemy can both touch to gain from.
90	Skylight in the ceiling (no glass); possibly for light, air, or a smoke exit.
91	Window to a higher or lower chamber.
92	Trap door you can use to get down to another chamber or push someone down.
93	Dust all over the floor you can whip up to give yourself concealment.
94	Moving platform (elevator, crane, etc.) you can use or break.
95	Tiles 5′ square that give the person on them special powers, like +5 on attacks.
96	Wildly uneven, rubble-strewn floor you can use to get the high ground.
97	Huge clockwork gears you can climb on, jam to stop, or throw someone into.
98	Fountain you can climb, topple, dip water out of, redirect toward a target, etc.
99	Huge round statue/idol head you can dislodge and roll like a boulder.
100	Hanging vines that don’t impede melee but foil range weapons and certain spells.

Notice how many items on the list are in this robber hideout. Imagine a fight here moving from one place to another, knocking over chairs, leaping on tables, slamming the gates to lock the heroes in with the treasure, then running down the stairs, blocking the staircase with furniture, etc.